High-Speed Friction Stir Welding of AA7075-T6 Sheet: Microstructure, Mechanical Properties, Micro-texture, and Thermal History

Zhang, Jingyi; Upadhyay, Piyush; Hovanski, Yuri; Field, David P.

doi:10.1007/s11661-017-4411-4

High-Speed Friction Stir Welding of AA7075-T6 Sheet: Microstructure, Mechanical Properties, Micro-texture, and Thermal History

Journal Article · 20 November 2017 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

DOI:https://doi.org/10.1007/s11661-017-4411-4· OSTI ID:1422298

Zhang, Jingyi; Upadhyay, Piyush; Hovanski, Yuri; Field, David P.

Friction-stir-welding (FSW) is a cost-effective and high quality joining process for aluminum alloys (especially heat-treatable allo ys) that has been applied successfully in the aerospace industry. However, the full potential of FSW on more cost-sensitive applications is still limited by the production rate, namely the welding speed of the process. The majority of literature evaluating FSW of aluminum alloys is based on welds made in the range of welding speeds around hundreds of millimeters per minute, and only a handful are at a moderate speed of 1 m/min. In this study we present a microstructural analysis of friction stir welded AA7075-T6 blanks with welding speeds up to 3 m/min. Textures, microstructures, mechanical properties, and weld quality are analyzed using TEM, EBSD, metallographic imaging, and Vickers hardness. Results are coupled with welding parameters to aid in the understanding of the complex material flow and texture gradients within the welds in an effort to optimize welding parameters for high speed processing.

Research Organization:: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-76RL01830

OSTI ID:: 1422298

Report Number(s):: PNNL-SA-128971; VT0505000

Journal Information:: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Vol. 49, Issue 1; ISSN 1073-5623

Publisher:: ASM International

Country of Publication:: United States

Language:: English

References (83)

Relationships between weld parameters, hardness distribution and temperature history in alloy 7050 friction stir welds No authors listed Science and Technology of Welding and Joining https://doi.org/10.1179/174329305X37024		April 2005
On experimental optimization of friction stir welding of aluminum 6061: understanding processing-microstructure-property relations No authors listed The International Journal of Advanced Manufacturing Technology https://doi.org/10.1007/s00170-015-6932-6		March 2015
Development of grain structure during friction stir welding No authors listed Scripta Materialia https://doi.org/10.1016/j.scriptamat.2004.04.017		August 2004
The influence of artificial aging on the microstructure, mechanical properties, corrosion, and environmental cracking susceptibility of a 7075 friction-stir-weld No authors listed Materials and Corrosion https://doi.org/10.1002/maco.200704063		October 2007
Friction stir welding characteristics of 2017-T351 aluminum alloy sheet No authors listed Journal of Materials Science https://doi.org/10.1007/s10853-005-2705-1		June 2005
Influence of welding speed on the fatigue of friction stir welds, and comparison with MIG and TIG No authors listed International Journal of Fatigue https://doi.org/10.1016/S0142-1123(03)00059-8		December 2003
Effects of tool–workpiece interface temperature on weld quality and quality improvements through temperature control in friction stir welding No authors listed The International Journal of Advanced Manufacturing Technology https://doi.org/10.1007/s00170-013-5364-4		November 2013
Microstructural Characteristics and Mechanical Properties of 7050-T7451 Aluminum Alloy Friction Stir-Welded Joints No authors listed Journal of Materials Engineering and Performance https://doi.org/10.1007/s11665-016-2106-4		May 2016
Effect of tool rotational speed on residual stress, microstructure, and tensile properties of friction stir welded 6061-T6 aluminum alloy thick plate No authors listed The International Journal of Advanced Manufacturing Technology https://doi.org/10.1007/s00170-015-7859-7		September 2015
Thermal Management in Friction-Stir Welding of Precipitation-Hardened Aluminum Alloys No authors listed JOM https://doi.org/10.1007/s11837-015-1381-0		March 2015
Microstructural investigation of friction stir welded 7050-T651 aluminium No authors listed Acta Materialia https://doi.org/10.1016/S1359-6454(02)00449-4		February 2003
Effects of Friction Stir Welding Speed on AA2195 alloy No authors listed MATEC Web of Conferences https://doi.org/10.1051/matecconf/20164501003		January 2016
Microstructure, crystallographic texture and mechanical properties of friction stir welded AA2017A No authors listed Materials Characterization https://doi.org/10.1016/j.matchar.2011.12.005		February 2012
Effects of forge axis force and backing plate thermal diffusivity on FSW of AA6056 No authors listed Materials Science and Engineering: A https://doi.org/10.1016/j.msea.2012.08.018		December 2012
Microtexture in the friction-stir weld of an aluminum alloy No authors listed Metallurgical and Materials Transactions A https://doi.org/10.1007/s11661-001-0351-z		April 2001
Temperature measurement and control of bobbin tool friction stir welding No authors listed The International Journal of Advanced Manufacturing Technology https://doi.org/10.1007/s00170-015-8116-9		December 2015
Friction Stir Processing Technology: A Review No authors listed Metallurgical and Materials Transactions A https://doi.org/10.1007/s11661-007-9459-0		February 2008
Dynamic Recrystallization of Al Alloy 7075 in Turning No authors listed Journal of Manufacturing Science and Engineering https://doi.org/10.1115/1.4032807		March 2016
Friction stir welding and processing No authors listed Materials Science and Engineering: R: Reports https://doi.org/10.1016/j.mser.2005.07.001		August 2005
High-Speed Friction-Stir Welding to Enable Aluminum Tailor-Welded Blanks No authors listed JOM https://doi.org/10.1007/s11837-015-1384-x		April 2015
In-process heat treatments to improve FS-welded butt joints No authors listed The International Journal of Advanced Manufacturing Technology https://doi.org/10.1007/s00170-008-1750-8		September 2008
Effect of post-weld heat treatment on the mechanical properties of 2219-O friction stir welded joints No authors listed Journal of Materials Science https://doi.org/10.1007/s10853-005-0640-9		January 2006
Effect of Strain Rate Upon Plastic Flow of Steel No authors listed Journal of Applied Physics https://doi.org/10.1063/1.1707363		January 1944
Friction stir weld nugget temperature asymmetry No authors listed Science and Technology of Welding and Joining https://doi.org/10.1179/136217109X12562846839150		January 2010
Residual stress in friction stir-welded Al sheets No authors listed Physica B: Condensed Matter https://doi.org/10.1016/j.physb.2004.03.128		July 2004
Optimization of process parameters of aluminum alloy AA 2014-T6 friction stir welds by response surface methodology No authors listed Defence Technology https://doi.org/10.1016/j.dt.2015.03.003		September 2015
A study of texture patterns in friction stir welds No authors listed Acta Materialia https://doi.org/10.1016/j.actamat.2007.11.016		April 2008
Investigation of precipitation in an Al–Zn–Mg alloy after two-step ageing treatment at 100° and 150°C No authors listed Materials Science and Engineering: A https://doi.org/10.1016/S0921-5093(99)00231-2		September 1999
Microstructural evolution ahead of the tool in aluminum friction stir welds No authors listed Scripta Materialia https://doi.org/10.1016/j.scriptamat.2007.09.063		March 2008
Recrystallization mechanisms during friction stir welding/processing of aluminum alloys No authors listed Scripta Materialia https://doi.org/10.1016/j.scriptamat.2007.09.064		March 2008
Microstructural evolution and mechanical properties of friction-stir-welded Al–Mg–Si joint No authors listed Materials Science and Engineering: A https://doi.org/10.1016/j.msea.2013.11.074		February 2014
Microstructural Evolution in Friction Stir Welded 1050 Aluminum and 6061 Aluminum Alloy No authors listed MATERIALS TRANSACTIONS https://doi.org/10.2320/matertrans.45.2665		January 2004
Effect of cooling media on residual stresses induced by a solid-state welding: underwater FSW No authors listed The International Journal of Advanced Manufacturing Technology https://doi.org/10.1007/s00170-015-7653-6		August 2015
High Rotation Speed Friction Stir Welding for 2014 Aluminum Alloy Thin Sheets No authors listed Journal of Materials Engineering and Performance https://doi.org/10.1007/s11665-017-2524-y		February 2017
Friction stir welding characteristics of different heat-treated-state 2219 aluminum alloy plates No authors listed Materials Science and Engineering: A https://doi.org/10.1016/j.msea.2006.01.029		March 2006
Optimization of friction stir welding parameters for improved corrosion resistance of AA2219 aluminum alloy joints No authors listed Defence Technology https://doi.org/10.1016/j.dt.2015.05.003		December 2015
Finite element simulation of material flow in friction stir welding No authors listed Science and Technology of Welding and Joining https://doi.org/10.1179/136217101101538640		June 2001
The adjustment strategy of welding parameters for spray formed 7055 aluminum alloy underwater friction stir welding joint No authors listed Materials & Design https://doi.org/10.1016/j.matdes.2015.09.038		December 2015
Enhancing mechanical properties of friction stir welded 2219Al-T6 joints at high welding speed through water cooling and post-welding artificial ageing No authors listed Materials Characterization https://doi.org/10.1016/j.matchar.2015.06.003		August 2015
Fine-grain evolution in friction-stir processed 7050 aluminum No authors listed Scripta Materialia https://doi.org/10.1016/S1359-6462(03)00082-4		May 2003
Hot deformation behavior and microstructural evolution of homogenized 7050 aluminum alloy during compression at elevated temperature No authors listed Materials Science and Engineering: A https://doi.org/10.1016/j.msea.2010.11.016		January 2011
Friction-stir welding effects on microstructure and fatigue of aluminum alloy 7050-T7451 No authors listed Metallurgical and Materials Transactions A https://doi.org/10.1007/s11661-000-0136-9		September 2000
Effect of grain size refinement and precipitation reactions on strengthening in friction stir processed Al–Cu alloys No authors listed Scripta Materialia https://doi.org/10.1016/j.scriptamat.2011.09.009		December 2011
Finite element modeling of friction stir welding—thermal and thermomechanical analysis No authors listed International Journal of Machine Tools and Manufacture https://doi.org/10.1016/S0890-6955(03)00158-5		October 2003
Optimization of processing-microstructure-properties relationship in friction-stir welded 6061-T6 aluminum alloy No authors listed Materials Science and Engineering: A https://doi.org/10.1016/j.msea.2016.03.063		April 2016
Friction Stir Welding of 7075-T651 Aluminium Alloy No authors listed Practical Metallography https://doi.org/10.3139/147.110363		January 2016
Constitutive Description of 7075 Aluminum Alloy During Hot Deformation by Apparent and Physically-Based Approaches No authors listed Journal of Materials Engineering and Performance https://doi.org/10.1007/s11665-015-1389-1		January 2015
Friction stir welding of lap joints: Influence of process parameters on the metallurgical and mechanical properties No authors listed Materials Science and Engineering: A https://doi.org/10.1016/j.msea.2009.04.046		August 2009
Ultimate tensile strength optimization of different FSW aluminium alloy joints No authors listed The International Journal of Advanced Manufacturing Technology https://doi.org/10.1007/s00170-015-6871-2		February 2015
The strength of friction stir welded and friction stir processed aluminium alloys No authors listed Scripta Materialia https://doi.org/10.1016/j.scriptamat.2007.09.061		March 2008
Mechanical properties and their relations to microstructural characteristics of high-speed friction stir-welded AA6005A-T6 aluminum hollow extrusions No authors listed The International Journal of Advanced Manufacturing Technology https://doi.org/10.1007/s00170-016-9032-3		June 2016
Continuous dynamic recrystallization during friction stir welding of high strength aluminum alloys No authors listed Scripta Materialia https://doi.org/10.1016/S1359-6462(00)00480-2		September 2000
High speed friction stir welding of aluminium alloys No authors listed Science and Technology of Welding and Joining https://doi.org/10.1179/136217110X12785889550181		November 2010
Softening mechanism and microstructure evolution of as-extruded 7075 aluminum alloy during hot deformation No authors listed Materials Characterization https://doi.org/10.1016/j.matchar.2014.01.019		April 2014
Residual stress distribution and microstructure in the friction stir weld of 7075 aluminum alloy No authors listed Journal of Materials Science https://doi.org/10.1007/s10853-015-9280-x		August 2015
Internal defect and process parameter analysis during friction stir welding of Al 6061 sheets No authors listed The International Journal of Advanced Manufacturing Technology https://doi.org/10.1007/s00170-012-4276-z		June 2012
Effect of friction stir processing on microstructure and mechanical properties of aluminium No authors listed Materials Science and Engineering: A https://doi.org/10.1016/j.msea.2012.01.055		March 2012
EBSD Analysis of Friction Stir Weld Textures No authors listed JOM https://doi.org/10.1007/s11837-013-0802-1		November 2013
High strain rate superplasticity in a commercial 2024 Al alloy via friction stir processing No authors listed Materials Science and Engineering: A https://doi.org/10.1016/S0921-5093(03)00367-8		October 2003
Mechanical response of 2024-7075 aluminium alloys joined by Friction Stir Welding No authors listed Journal of Materials Science https://doi.org/10.1007/s10853-005-0474-5		July 2005
Microstructural evolution of 6063 aluminum during friction-stir welding No authors listed Metallurgical and Materials Transactions A https://doi.org/10.1007/s11661-999-0251-1		September 1999
Quantitative evaluation of precipitates in an Al–Zn–Mg–Cu alloy after isothermal aging No authors listed Materials Characterization https://doi.org/10.1016/j.matchar.2005.10.004		March 2006
Grain refinement process in commercial 7075-T6 aluminum alloy under friction stir welding and superplasticity No authors listed Materialwissenschaft und Werkstofftechnik https://doi.org/10.1002/mawe.200800288		April 2008
Material flow in butt friction stir welds in AA2024-T3 No authors listed Acta Materialia https://doi.org/10.1016/j.actamat.2005.10.052		February 2006
Influence of friction stir welding parameters on the microstructural and mechanical properties of AA 6016-T4 thin welds No authors listed Materials & Design https://doi.org/10.1016/j.matdes.2008.09.016		June 2009
Stationary shoulder FSW for joining high strength aluminum alloys No authors listed Journal of Materials Processing Technology https://doi.org/10.1016/j.jmatprotec.2015.02.015		July 2015
Quantifying crystallographic texture in the probe-dominated region of thick-section friction-stir-welded aluminium No authors listed Scripta Materialia https://doi.org/10.1016/j.scriptamat.2008.04.047		September 2008
Material flow in FSW of AA7075–T6 butt joints: numerical simulations and experimental verifications No authors listed Science and Technology of Welding and Joining https://doi.org/10.1179/174329306X113271		July 2006
Thermal modeling of friction stir welding in a moving coordinate system and its validation No authors listed International Journal of Machine Tools and Manufacture https://doi.org/10.1016/S0890-6955(03)00022-1		May 2003
Comparative hot workability of 7012 and 7075 alloys after different pretreatments No authors listed Materials Science and Engineering: A https://doi.org/10.1016/0921-5093(94)09714-3		July 1995
Effects of microstructural heterogeneity on very high cycle fatigue properties of 7050-T7451 aluminum alloy friction stir butt welds No authors listed International Journal of Fatigue https://doi.org/10.1016/j.ijfatigue.2015.10.001		February 2016
Texture variation and its influence on the tensile behavior of a friction-stir processed magnesium alloy No authors listed Scripta Materialia https://doi.org/10.1016/j.scriptamat.2006.02.019		June 2006
Determination of strain rate in Friction Stir Welding by three-dimensional visualization of material flow using X-ray radiography No authors listed Scripta Materialia https://doi.org/10.1016/j.scriptamat.2015.05.006		September 2015
Tensile properties and fracture locations of friction-stir-welded joints of 2017-T351 aluminum alloy No authors listed Journal of Materials Processing Technology https://doi.org/10.1016/S0924-0136(03)00806-9		December 2003
Analysis of AA 6082-T6 welds strength mismatch: stress versus hardness relationships No authors listed The International Journal of Advanced Manufacturing Technology https://doi.org/10.1007/s00170-015-6866-z		February 2015
Relationship between grain size and Zener–Holloman parameter during friction stir processing in AZ31 Mg alloys No authors listed Scripta Materialia https://doi.org/10.1016/j.scriptamat.2004.05.043		September 2004
Banded microstructure in AA2024-T351 and AA2524-T351 aluminum friction stir welds No authors listed Materials Science and Engineering: A https://doi.org/10.1016/S0921-5093(03)00532-X		January 2004
Flow visualization and residual microstructures associated with the friction-stir welding of 2024 aluminum to 6061 aluminum No authors listed Materials Science and Engineering: A https://doi.org/10.1016/S0921-5093(99)00204-X		November 1999
Effect of Rotation Speed to Welding Speed Ratio on Microstructure and Mechanical Behavior of Friction Stir Welded Aluminum-Lithium Alloy Joints: Microstructure and Mechanical Behavior of Friction Stir Welded Al-Li Alloy No authors listed Advanced Engineering Materials https://doi.org/10.1002/adem.201300147		August 2013
Heterogeneity of crystallographic texture in friction stir welds of aluminum No authors listed Metallurgical and Materials Transactions A https://doi.org/10.1007/s11661-001-1037-2		November 2001
Effect of the Zener–Hollomon parameter on the microstructures and mechanical properties of Cu subjected to plastic deformation No authors listed Acta Materialia https://doi.org/10.1016/j.actamat.2008.10.021		February 2009
Mikrostrukturelle, mechanische und korrosive Eigenschaften reibrührgeschweißter Stumpfnähte in Aluminiumlegierungen No authors listed Materialwissenschaft und Werkstofftechnik https://doi.org/10.1002/mawe.19980291012		October 1998
Material Flow Modification in a FSW Through Introduction of Flats No authors listed Metallurgical and Materials Transactions B https://doi.org/10.1007/s11663-015-0523-7		November 2015

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