skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effect of tool design and pass strategy on defect elimination and uniform, enhanced tensile properties of friction stir processed high-pressure die-cast A380 alloy

Journal Article · · Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing

This work reports implementation of friction stir processing (FSP) to locally modify microstructure and create a defect-free processing zone with the aid of different tool designs and altering the passing strategy for two different process parameter combinations. Here, FSP is applied on high pressure die-cast (HPDC) A380 alloy, a widely used Al-Si alloy fabricated in the die casting sector for automotive and aerospace applications. However, the presence of gas and shrinkage porosity, brittle needle-shaped Fe-containing ß-FeSiAl5 intermetallic compounds, Al-dendrites, coarse and acicular silicon particles, and large second-phase particulates have a detrimental influence on the uniformity of tensile properties across the thickness direction of an HPDC plate. FSP is able to eliminate porosity, refine microstructure and improve tensile properties. An FSP tool design and a passing strategy are identified for the best microstructure consolidation and uniform enhanced tensile properties. This study noted the importance of tool features such as scroll design and flats on tool pin and multiple pass orientation strategy to find best combination of defect-free refined microstructure and uniform tensile strength and ductility across the processing zone of HPDC Al alloys.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1909782
Report Number(s):
PNNL-SA-177217
Journal Information:
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing, Vol. 861; ISSN 0921-5093
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (50)

Effect of friction stir processing on fatigue behavior of A356 alloy journal August 2004
The influence of pin geometry on bonding and mechanical properties in friction stir weld 2014 Al alloy journal October 2005
Ductilizing of a brittle as-cast hypereutectic Al–Si alloy by friction stir processing journal November 2015
Friction stir welding and processing journal August 2005
The skin effect and the yielding behavior of cold chamber high pressure die cast Mg–Al alloys journal April 2012
Effect of friction stir processing on fatigue behavior of an investment cast Al–7Si–0.6 Mg alloy journal February 2010
Effect of Friction Stir Processing on Microstructure and Tensile Properties of an Investment Cast Al-7Si-0.6Mg Alloy journal June 2010
Influence of friction stir processing on the room temperature fatigue cracking mechanisms of A356 aluminum alloy journal February 2018
Validation of Marker Material Flow in 4mm Thick Friction Stir Welded Al 2024-T351 through Computer Microtomography and dedicated Metallographic Techniques journal June 2006
Effect of multiple-pass friction stir processing on microstructure and tensile properties of a cast aluminum–silicon alloy journal May 2006
Influence of tool geometry and rotational speed on mechanical properties and defect formation in friction stir lap welded 5456 aluminum alloy sheets journal June 2014
Effect of tool pin design on the microstructural evolutions and tribological characteristics of friction stir processed structural steel journal May 2015
Effect of tool pin profile on the material flow characteristics of AA6061 journal April 2017
High strain rate superplasticity in a friction stir processed 7075 Al alloy journal December 1999
Effect of tool shoulder features on defects and tensile properties of friction stir welded aluminum 6061-T6 journal May 2015
Improvement of mechanical properties of aluminum die casting alloy by multi-pass friction stir processing journal November 2006
Periodical plastic flow pattern in friction stir processed Al–Mg alloy journal June 2008
Influence of shoulder geometry on microstructure and mechanical properties of friction stir welded 6082 aluminium alloy journal January 2007
Friction stir processing of aluminum cast alloys for high performance applications journal November 2011
Flow visualization and simulation in FSW journal March 2008
Transient Heat and Material Flow Modeling of Friction Stir Processing of Magnesium Alloy using Threaded Tool journal September 2011
Numerical simulation of material flow behavior of friction stir welding influenced by rotational tool geometry journal October 2012
Particle refinement and fine-grain formation leading to enhanced mechanical behaviour in a hypo-eutectic Al–Si alloy subjected to multi-pass friction stir processing journal March 2016
Effect of stress ratio on the fatigue behavior of a friction stir processed cast Al–Si–Mg alloy journal November 2009
Influence of multi-pass friction stir processing on wear behaviour and machinability of an Al-Si hypoeutectic A356 alloy journal October 2016
Dimensionless correlation to estimate peak temperature during friction stir welding journal September 2006
On the formation of onion rings in friction stir welds journal April 2002
Role of Scroll Shoulder and Pin Designs on Axial Force, Material Flow and Mechanical Properties of Friction Stir Welded Al–Mg–Si Alloy journal January 2020
Microstructural refinement and property enhancement of cast light alloys via friction stir processing journal March 2008
Influence of friction stir processing tool design on microstructure and superplastic behavior of Al-Mg alloys journal July 2016
A flow-partitioned deformation zone model for defect formation during friction stir welding journal March 2008
Material flow in heterogeneous friction stir welding of thin aluminium sheets: Effect of shoulder geometry journal December 2008
Effect of friction stir processing conditions on fatigue behavior and texture development in A356-T6 cast aluminum alloy journal November 2015
Effect of friction stir processing on the tensile and fatigue behavior of a cast A206 alloy journal January 2013
Effect of tool geometry and welding speed on mechanical properties of dissimilar AA2198–AA2024 FSWed joint journal August 2018
The Metallurgy of Aluminum Alloys for Structural High-Pressure Die Castings journal November 2020
Effects of friction stir processing on mechanical properties of the cast aluminum alloys A319 and A356 journal July 2005
Three defect types in friction stir welding of aluminum die casting alloy journal January 2006
Microstructural modification of as-cast Al-Si-Mg alloy by friction stir processing journal November 2006
Effect of polygonal pin profiles on friction stir processed superplasticity of AA7075 alloy journal February 2017
Multi-layered metal flow and formation of onion rings in friction stir welds journal July 2007
Friction stir processing and characterisation of A380 cast aluminium alloy journal November 2011
Effect of Tool Geometry and Process Parameters on Material Flow in FSW of an AA 2024-T351 Alloy journal March 2005
Optimizing weld quality of a friction stir welded aluminum alloy journal August 2015
The Ductility Variation of High-Pressure Die-Cast AE44 Alloy: The Role of Inhomogeneous Microstructure journal April 2021
Effect of two-pass friction stir processing on the microstructure and mechanical properties of as-cast binary Al–12Si alloy journal June 2015
Effect of tool geometry and process condition on static strength of a magnesium friction stir lap linear weld journal March 2011
Influences of tool pin profile and tool shoulder diameter on the formation of friction stir processing zone in AA6061 aluminium alloy journal January 2008
Toward optimum friction stir welding tool shoulder diameter journal January 2011
Microstructure-refinement–driven enhanced tensile properties of high-pressure die-cast A380 alloy through friction stir processing journal June 2022