Enhanced Work-Hardening and Toughening Via Contiguous Stress-Induced Martensitic Transformation and Mechanical Twinning in Ti-Zr-Hf-Nb-Al High Entropy Alloys

2019 ◽  
Author(s):  
Lu Wang ◽  
Chao Fu ◽  
Yidong Wu ◽  
Runguang Li ◽  
Yandong Wang ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Work Hardening ◽  
Mechanical Twinning ◽  
High Entropy Alloys ◽  
High Entropy

scholarly journals Ductile Ti-rich high-entropy alloy controlled by stress induced martensitic transformation and mechanical twinning

2019 ◽  
Vol 763 ◽  
pp. 138147 ◽  
Author(s):  
Lu Wang ◽  
Chao Fu ◽  
Yidong Wu ◽  
Runguang Li ◽  
Yandong Wang ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Mechanical Twinning ◽  
High Entropy Alloy ◽  
High Entropy

scholarly journals Effect of Stacking Fault Energy on Microstructure and Texture Evolution during the Rolling of Non-Equiatomic CrMnFeCoNi High-Entropy Alloys

Crystals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 607
Author(s):  
G. Dan Sathiaraj ◽  
Rajib Kalsar ◽  
Satyam Suwas ◽  
Werner Skrotzki
Keyword(s):  
Cryogenic Temperature ◽  
Texture Evolution ◽  
Shear Banding ◽  
Mechanical Twinning ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
Dislocation Slip ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Evolution Of Microstructure

The evolution of microstructure and texture in three non-equiatomic CrMnFeCoNi high-entropy alloys (HEAs) with varying stacking fault energy (SFE) has been studied in up to 90% rolling reductions at both room and cryogenic temperature. All the HEAs deform by dislocation slip and additional mechanical twinning at intermediate and shear banding at high rolling strains. The microstructure is quite heterogeneous and, with strain, becomes highly fragmented. During rolling, a characteristic brass-type texture develops. Its strength increases with a decreasing SFE and the lowering of the rolling temperature. The texture evolution is discussed with regard to planar slip, mechanical twinning, and shear banding.

scholarly journals High-temperature martensitic transformation of CuNiHfTiZr high- entropy alloys

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Shan-Hsiu Chang ◽  
Po-Ting Lin ◽  
Che-Wei Tsai
Keyword(s):  
High Temperature ◽  
Martensitic Transformation ◽  
Shape Memory ◽  
Structural Evolution ◽  
Alloying Elements ◽  
High Entropy Alloys ◽  
X Ray Diffraction ◽  
High Entropy ◽  
High Transformation ◽  
Niti Shape Memory Alloys

AbstractOne of the major challenges of near-equiatomic NiTi shape memory alloys is their limitation for high-temperature applications. To overcome this barrier, researchers have tried to enhance the transformation temperatures by addition of alloying elements or even by introducing the concept of high-entropy alloys (HEAs). In this study, the CuNiHfTiZr HEAs were developed for high-temperature shape memory effect. Based on their solubility and electron configurations, the alloying elements are divided into two groups, (CuNi)50 and (HfTiZr)50. The content of Cu in (CuNi)50 is modulated to investigate the influences of Cu on martensitic transformation of the HEAs by studying structural evolution and transformation behavior. The results of x-ray diffraction and thermal expansion tests revealed that Cu15Ni35Hf16.67Ti16.67Zr16.67 possesses high transformation temperature, narrow hysteresis temperature loops, and good dimensional stability within this HEA system.

scholarly journals Multistage work hardening assisted by multi-type twinning in ultrafine-grained heterostructural eutectic high-entropy alloys

2020 ◽  
Vol 41 ◽  
pp. 62-71
Author(s):  
Peijian Shi ◽  
Yunbo Zhong ◽  
Yi Li ◽  
Weili Ren ◽  
Tianxiang Zheng ◽  
...  
Keyword(s):  
Work Hardening ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Ultrafine Grained

Superelastic effect in Ti-rich high entropy alloys via stress-induced martensitic transformation

2019 ◽  
Vol 162 ◽  
pp. 112-117 ◽  
Author(s):  
Lu Wang ◽  
Chao Fu ◽  
Yidong Wu ◽  
Runguang Li ◽  
Xidong Hui ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Superelastic Effect

scholarly journals Twinning-mediated work hardening and texture evolution in CrCoFeMnNi high entropy alloys at cryogenic temperature

2017 ◽  
Vol 131 ◽  
pp. 419-427 ◽  
Author(s):  
T.K. Liu ◽  
Z. Wu ◽  
A.D. Stoica ◽  
Q. Xie ◽  
W. Wu ◽  
...  
Keyword(s):  
Work Hardening ◽  
Cryogenic Temperature ◽  
Texture Evolution ◽  
High Entropy Alloys ◽  
High Entropy
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