Cyclic hardening behavior and deformation mechanisms of friction-stir-welded dissimilar AA5083-to-AA2024 joints with heterogeneous microstructures

2021 ◽  
pp. 111465
Author(s):  
Pengliang Niu ◽  
Wenya Li ◽  
Yuhua Chen ◽  
Fencheng Liu ◽  
Jie Gong ◽  
...  
Keyword(s):  
Cyclic Hardening ◽  
Deformation Mechanisms ◽  
Friction Stir ◽  
Hardening Behavior ◽  
Heterogeneous Microstructures

Stir zone anisotropic work hardening behavior in friction stir processed EN8 medium carbon steel

2020 ◽  
pp. 140582
Author(s):  
Md Anwar Ali Anshari ◽  
Murshid Imam ◽  
Mohd Zaheer Khan Yusufzai ◽  
Viswanath Chinthapenta ◽  
Rajnish Mishra
Keyword(s):  
Carbon Steel ◽  
Work Hardening ◽  
Medium Carbon Steel ◽  
Stir Zone ◽  
Medium Carbon ◽  
Work Hardening Behavior ◽  
Friction Stir ◽  
Hardening Behavior

Cyclic hardening behavior of roller hemming in the case of aluminum alloy sheets

2011 ◽  
Vol 32 (4) ◽  
pp. 2308-2316 ◽  
Author(s):  
Shuhui Li ◽  
Xing Hu ◽  
Yixi Zhao ◽  
Zhongqin Lin ◽  
Nanqiao Xu
Keyword(s):  
Aluminum Alloy ◽  
Cyclic Hardening ◽  
Hardening Behavior

Environmentally-Assisted Fatigue Behavior of 316 Stainless Steels in Simulated PWR Primary Environment: Strain Holding, Zn-Addition, and Their Combined Effect

2019 ◽  
Author(s):  
Hyeon Bae Lee ◽  
Ho-Sub Kim ◽  
Junjie Chen ◽  
Changheui Jang ◽  
Tae Soon Kim ◽  
...  
Keyword(s):  
Oxide Layer ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Cyclic Hardening ◽  
Combined Effect ◽  
Cyclic Behavior ◽  
Peak Strain ◽  
Pressurized Water ◽  
Hardening Behavior ◽  
Zn Addition

Abstract Low cycle fatigue (LCF) tests of type 316 stainless steel (SS) were conducted in simulated pressurized water reactor (PWR) environments to evaluate the effect of zinc (Zn) content and peak strain holding. The LCF lives of 316 SS increased about 2 to 3 times in PWR environments with Zn addition and peak strain holding (Zn-PWRhold condition). Their combined effect was investigated by using cyclic hardening behavior, dislocation structure analysis, and oxide layer observation. The cyclic behavior in Zn-PWRhold condition showed general primary hardening behavior but quite longer softening behavior than other test conditions. Also, the dislocation density was decreased with Zn addition and increased again with peak strain holding. The Zn penetrates into the oxide layer at the crack tip and modifies the oxide characteristics, which results in improvement of corrosion resistance.

Tensile Properties and Strain Hardening Behavior of a Friction Stir Welded AA2219 Al Alloy

2011 ◽  
Vol 291-294 ◽  
pp. 833-840 ◽  
Author(s):  
Wei Feng Xu ◽  
Jin He Liu ◽  
Dao Lun Chen ◽  
Guo Hong Luan ◽  
Jun Shan Yao
Keyword(s):  
Strain Hardening ◽  
Tensile Properties ◽  
Base Metal ◽  
Boundary Phase ◽  
Strain Hardening Exponent ◽  
Al Alloy ◽  
Second Phase ◽  
Premature Failure ◽  
Friction Stir ◽  
Hardening Behavior

Microstructures, tensile properties and work hardening behavior of friction stir welded (FSWed) AA2219-T62 aluminum alloy (in its one-third bottom slice of a 20 mm thick plate) were evaluated at different strain rates. While the yield strength was lower in the FSWed joint than in the base metal, the ultimate tensile strength of the FSWed joint approached that of the base metal. In particular the FSW resulted in a significant improvement in the ductility of the alloy due to the prevention of premature failure caused by intergranular cracking along the second-phase boundary related to the presence of the network-like grain boundary phase in the base metal. While stage III and IV hardening occurred after yielding in both base metal and FSWed samples, the FSW led to stronger hardening capacity and higher strain hardening exponent and rate due to the enhanced dislocation storage capacity associated with the microstructural change after FSW. The fracture surface of the FSWed joint was mainly characterized by dimples and tearing ridges along with micropores.

On the Similarity of Deformation Mechanisms During Friction Stir Welding and Sliding Friction of the AA5056 Alloy

2018 ◽  
Vol 60 (12) ◽  
pp. 2123-2129 ◽  
Author(s):  
A. V. Kolubaev ◽  
A. A. Zaikina ◽  
O. V. Sizova ◽  
K. V. Ivanov ◽  
A. V. Filippov ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Sliding Friction ◽  
Deformation Mechanisms ◽  
Friction Stir
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