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

doi:10.1007/s11661-017-4411-4

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

Full Record
Similar

Abstract

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.

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

Publication Date:: Mon Nov 20 00:00:00 EST 2017

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

Sponsoring Org.:: USDOE

OSTI Identifier:: 1422298

Report Number(s):: PNNL-SA-128971
Journal ID: ISSN 1073-5623; VT0505000

DOE Contract Number:: AC05-76RL01830

Resource Type:: Journal Article

Resource Relation:: Journal Name: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science; Journal Volume: 49; Journal Issue: 1

Country of Publication:: United States

Language:: English

Citation Formats


                    Zhang, Jingyi, Upadhyay, Piyush, Hovanski, Yuri, and Field, David P. High-Speed Friction Stir Welding of AA7075-T6 Sheet: Microstructure, Mechanical Properties, Micro-texture, and Thermal History.  United States: N. p., 2017. 
        Web.  doi:10.1007/s11661-017-4411-4.

Copy to clipboard


                    Zhang, Jingyi, Upadhyay, Piyush, Hovanski, Yuri, & Field, David P. High-Speed Friction Stir Welding of AA7075-T6 Sheet: Microstructure, Mechanical Properties, Micro-texture, and Thermal History.  United States.  doi:10.1007/s11661-017-4411-4.

Copy to clipboard


                    Zhang, Jingyi, Upadhyay, Piyush, Hovanski, Yuri, and Field, David P. Mon .  
        "High-Speed Friction Stir Welding of AA7075-T6 Sheet: Microstructure, Mechanical Properties, Micro-texture, and Thermal History".  United States.  
        doi:10.1007/s11661-017-4411-4.

Copy to clipboard


                    
@article{osti_1422298,

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

  author       = {Zhang, Jingyi and Upadhyay, Piyush and Hovanski, Yuri and Field, David P.},

  abstractNote = {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.},

  doi          = {10.1007/s11661-017-4411-4},

  journal      = {Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science},

  number       = 1,

  volume       = 49,

  place        = {United States},

  year         = {Mon Nov 20 00:00:00 EST 2017},

  month        = {Mon Nov 20 00:00:00 EST 2017}

}

Copy to clipboard

Journal Article:

DOI: 10.1007/s11661-017-4411-4

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Microstructure, crystallographic texture and mechanical properties of friction stir welded AA2017A

Ahmed, M.M.Z., E-mail: mohamed_ahmed4@s-petrol.suez.edu.eg ; Department of Metallurgical and Materials Engineering, Suez Canal University, Suez 43721 ; Wynne, B.P. ; ... - Materials Characterization

In this study a thick section (20 mm) friction stir welded AA2017A-T451 has been characterized in terms of microstructure, crystallographic texture and mechanical properties. For microstructural analysis both optical and scanning electron microscopes have been used. A detailed crystallographic texture analysis has been carried out using the electron back scattering diffraction technique. Crystallographic texture has been examined in both shoulder and probe affected regions of the weld NG. An entirely weak texture is observed at the shoulder affected region which is mainly explained by the effect of the sequential multi pass deformation experienced by both tool probe and tool shoulder.more »« less
DOI: 10.1016/J.MATCHAR.2011.12.005
Microstructure, texture, and mechanical properties of friction stir welded commercial brass alloy

Heidarzadeh, A., E-mail: ak.hz62@gmail.com - Materials Characterization

Microstructural evolution during friction stir welding of single-phase brass and corresponding mechanical properties were investigated. For this purpose, 2 mm thick brass plate was friction stir welded at a rotational speed of 450 rpm and traverse speed of 100 mm/min. The microstructure of the joint was studied using optical microscopy, scanning electron microscopy equipped with electron back scattered diffraction system, and scanning transmission electron microscopy. The mechanical properties were measured using hardness and tensile tests. The formation of subgrains and their transformation into new grains in conjunction with existence of A{sub 1}{sup ⁎}, A{sub 2}{sup ⁎} and C texture componentsmore »« less
DOI: 10.1016/J.MATCHAR.2016.07.009
The Role of Friction Stir Welding on the Microstructure and Mechanical Properties of AZ31B-H24 Mg alloy

Darzi, Kh. ; Saeid, T. - AIP Conference Proceedings

In this study, an attempt was made to join AZ31B magnesium alloy by friction stir welding (FSW) process. A single tool with cylindrical screw threaded pin was used to investigate the effect of welding parameters on microstructure and mechanical properties of stir zone (SZ). Several welds were made at different rotational ({omega}) and traverse ({upsilon}) speeds, while the {omega}/{upsilon} ratios were kept constant. The optical and scanning electron microscopy were used to study the variation of microstructure across the welds. Moreover, micro-hardness and tensile tests were carried out to evaluate the mechanical properties of joints. It was found that {omega}more »« less
DOI: 10.1063/1.3663177
Microstructure, mechanical properties and microtexture of friction stir welded S690QL high yield steel

Paillard, Pascal - Materials Characterization

Two try-out campaigns of friction stir welding (FSW) were performed with different friction parameters to join S690QL high yield strength steel. The welds were investigated at macroscopic and microscopic scales using optical and electronic microscopy and microhardness mapping. Welds of the second campaign exhibit microstructures and mechanical properties in accordance with requirements for service use. Microtexture measurements were carried out in different zones of welds by electron backscattered diffraction (EBSD). It is shown that that texture of the bottom of the weld is similar to that of the base metal, suggesting a diffusion bonding mechanism. Finally, the mechanical properties (tensilemore »« less
DOI: 10.1016/J.MATCHAR.2016.11.005
Interfacial microstructure and properties of copper clad steel produced using friction stir welding versus gas metal arc welding

Shen, Z. ; Chen, Y. ; Haghshenas, M., E-mail: mhaghshe@uwaterloo.ca ; ... - Materials Characterization

A preliminary study compares the feasibility and microstructures of pure copper claddings produced on a pressure vessel A516 Gr. 70 steel plate, using friction stir welding versus gas metal arc welding. A combination of optical and scanning electron microscopy is used to characterize the grain structures in both the copper cladding and heat affected zone in the steel near the fusion line. The friction stir welding technique produces copper cladding with a grain size of around 25 μm, and no evidence of liquid copper penetration into the steel. The gas metal arc welding of copper cladding exhibits grain sizes overmore »« less
DOI: 10.1016/J.MATCHAR.2015.02.022