Microstructural modification and mechanical property improvement in friction stir zone of thixo-molded AE42 Mg alloy

2009 ◽  
Vol 480 (2) ◽  
pp. 340-346 ◽  
Author(s):  
Lina Yu ◽  
Kazuhiro Nakata ◽  
Jinsun Liao
Keyword(s):  
Mechanical Property ◽  
Stir Zone ◽  
Mg Alloy ◽  
Friction Stir ◽  
Microstructural Modification

Liquid Penetration Induced Cracking in Mg-Alloy Spot Welds

2008 ◽  
Vol 580-582 ◽  
pp. 409-412 ◽  
Author(s):  
M. Yamamoto ◽  
A. Gerlich ◽  
T.H. North ◽  
K. Shinozaki
Keyword(s):  
Spot Welding ◽  
Friction Stir Spot Welding ◽  
Stir Zone ◽  
Mg Alloy ◽  
Liquid Penetration ◽  
Key Factors ◽  
Spot Welds ◽  
Friction Stir ◽  
Temperature Cycles

Liquid Penetration Induced (LPI) cracking during AZ91, AZ31 and AM60 friction stir spot welding is investigated. The temperature cycles, within the stir zone and in the TMAZ region, are examined. The mechanism and the key factors determining LPI cracking in Mg-alloy friction stir spot welds are delineated.

Microstructural Evolution of Cast Mg-Al-Ca Alloy during Friction Stir Processing

2007 ◽  
Vol 539-543 ◽  
pp. 3739-3744 ◽  
Author(s):  
Da Tong Zhang ◽  
Mayumi Suzuki ◽  
Kouichi Maruyama
Keyword(s):  
Mechanical Property ◽  
Grain Size ◽  
Magnesium Alloy ◽  
Base Metal ◽  
Microstructural Evolution ◽  
Friction Stir Processing ◽  
Stir Zone ◽  
Plate Surface ◽  
Friction Stir ◽  
Microstructure And Mechanical Property

A thixomoulded magnesium alloy containing thermally stable Al2Ca phase was friction stir processed, and its microstructure and mechanical property were investigated. In friction stir zone, the cast structure of the base metal is replaced by fine magnesium grains containing fine dispersoides of Al2Ca. Due to the refined grain size of 0.8-1 μm, hardness of friction stir zone is higher than that of base metal. Texture was developed at top and bottom surfaces, (0002) being parallel to the plate surface, whereas (0001) plane is randomly oriented in the center of friction stir zone.

Enhancement of Formability in Magnesium Alloy AZ31B via Friction Stir Processing

2007 ◽  
Vol 539-543 ◽  
pp. 3775-3780 ◽  
Author(s):  
Yutaka S. Sato ◽  
A. Sasaki ◽  
A. Sugimoto ◽  
A. Honda ◽  
Hiroyuki Kokawa
Keyword(s):  
Grain Size ◽  
Friction Stir Processing ◽  
Base Material ◽  
Mg Alloys ◽  
Stir Zone ◽  
Mg Alloy ◽  
Homogeneous Microstructure ◽  
Friction Stir ◽  
Magnesium Alloy Az31b ◽  
Plane Strain Deformation

Mg alloy has a poor formability at room temperature because of lack of the active slip systems, but the grain refinement improves its ductility. Friction stir processing (FSP) can create homogeneous microstructure consisting of fine grains in Mg alloys, thus it would be expected that FSP enhances the formability of Mg alloys. In this study, multi-pass FSP was applied to Mg alloy AZ31B, and then formability of FSPed alloy was evaluated. Multi-pass FSP produced the fine recrystallized grains in Mg alloy. The stir zone exhibited larger fracture limit major strains than the base material under uniaxial tension and plane strain deformation, and these values increased with decreasing grain size. The stir zone having grain size of 2.9 μm showed the fracture limit major strains which are roughly as same as those of an annealed pure Al. The present study suggests that FSP is an effective method to enhance the formability of Mg alloys.

scholarly journals Influence of tool offsetting and base metal positioning on the material flow of AA5052-AA6061 dissimilar friction stir welding

2020 ◽  
Vol 14 (1) ◽  
pp. 6393-6402 ◽  
Author(s):  
Luqman Hakim Ahmad Shah ◽  
Abdelbaset Midawi ◽  
Scott Walbridge ◽  
Adrian Gerlich
Keyword(s):  
Mechanical Property ◽  
Friction Stir Welding ◽  
Material Flow ◽  
Base Material ◽  
Stir Zone ◽  
Base Metals ◽  
Friction Stir ◽  
Tool Offset ◽  
Dissimilar Friction Stir Welding ◽  
Property Characterization

This study examines dissimilar friction stir welding of AA5052-AA6061 aluminum alloys with varying tool offsets. The base metals were positioned and fixed at a slight diagonal positioning such that varying tool offset position from the centreline can also be varied along the length of the weld. After the fabrication process, microstructural and mechanical property characterization was subsequently conducted. The results show that, above a certain threshold for tool offset, incomplete consolidation (i.e. kissing bond defects) will occur. Regardless of the base material positioning, a zero tool offset shows optimum intermixing in the stir zone. EDX mapping confirms the presence of a distinct interface between both materials in the stir zone region. However, enhanced material intermixing and better elongation are observed when AA6061 alloy is positioned at the tool advancing side.

Impact Toughness of Friction Stir Welded Al-Mg Alloy*

2014 ◽  
Vol 56 (10) ◽  
pp. 837-841
Author(s):  
Aleksandar Sedmak ◽  
Abdasalam Mohamed Mahdi Eramah ◽  
Srđan Tadić ◽  
Srđa Perković ◽  
Horia Dascau
Keyword(s):  
Impact Toughness ◽  
Mg Alloy ◽  
Friction Stir

Assessing the Effect of Altering Secondary Phase in Friction Stir Processed AZ91 Mg Alloy by Solution Heat Treatment

2020 ◽  
Author(s):  
Hemendra Patle ◽  
Venkateswarlu Badisha ◽  
Yogeshwar Chakrapani Venkatesan ◽  
Siva Irullappasamy ◽  
Ratna Sunil B ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Solution Heat Treatment ◽  
Secondary Phase ◽  
Mg Alloy ◽  
Friction Stir

Mechanical property and characterization of 7A04-T6 aluminum alloys bonded by friction stir welding

2020 ◽  
Vol 52 ◽  
pp. 263-269 ◽  
Author(s):  
Jianing Li ◽  
Molin Su ◽  
Wenjun Qi ◽  
Chen Wang ◽  
Peng Zhao ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Friction Stir Welding ◽  
Aluminum Alloys ◽  
Friction Stir
Sign in / Sign up

Export Citation Format

Share Document