Influence of tantalum composition on mechanical behavior and deformation mechanisms of TiZrHfTax high entropy alloys

Huang，Yuhe1,2; Gao，Junheng1,3; Wang，Shuize3; Guan，Dikai1; Xu，Yidong1,4; Hu，Xiaogang2; Rainforth，W. Mark1; Zhu，Qiang2; Todd，Iain1

2022-05-15

10.1016/j.jallcom.2022.163796

JOURNAL OF ALLOYS AND COMPOUNDS   影响因子和分区

0925-8388

The effects of metastability engineering on tuning deformation behavior and deformation mechanisms in TiZrHfTa (x = 1.00, 0.80, 0.60, 0.50) refractory body-centered cubic (BCC) high entropy alloys were investigated, with specific emphasis on elucidating the underlying interplay between phase stability, mechanical property, and deformation twins. It was found that in proper thermomechanical treated samples, a variation of tantalum content can effectively tune the activation of various deformation mechanisms. Detailed electron back-scattered diffraction and transmission electron microscopy analyses revealed for the first time that {332}<113̅> twinning, deformation-induced α’’ phase, {111} type I and <2̅11> type II twinning can be sequentially activated in TiZrHfTa (x = 1.00, 0.80, 0.60, 0.50) high entropy alloys with decreasing the content of tantalum. The comprehensive strengthening effect of transformation induced plasticity and twinning induced plasticity, was discussed and attributed as the pivotal factor for the improved work hardening capability and mechanical performances, especially for alloys with lower tantalum contents. Consequently, we extended the conventional bond order and d‐orbital energy level diagram that was originally developed for body-centered cubic titanium alloys for deformation mechanism evaluation to body-centered cubic high entropy alloys on the basis of current results, which sheds light on the design of ductile body-centered cubic high entropy alloys with expected deformation mechanisms and optimized mechanical performance.

Bond order and d-orbital energy level diagram Deformation-induced twinning High-entropy alloys Martensitic transformation Work hardening capability

EI

英语

其他

20220511560820

Entropy ; High resolution transmission electron microscopy ; High-entropy alloys ; Martensitic transformations ; Mechanisms ; Strain hardening ; Tantalum alloys ; Titanium alloys ; Twinning ; Zircaloy

Metallurgy and Metallography:531 ; Metallography:531.2 ; Heat Treatment Processes:537.1 ; Titanium and Alloys:542.3 ; Chromium and Alloys:543.1 ; Tantalum and Alloys:543.4 ; Iron Alloys:545.2 ; Mechanisms:601.3 ; Thermodynamics:641.1 ; Optical Devices and Systems:741.3 ; Crystal Growth:933.1.2

MATERIALS SCIENCE

2-s2.0-85123633110

Scopus

1.Department of Materials Science and Engineering,University of Sheffield,Sheffield,S1 3JD,United Kingdom
2.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Beijing Advanced Innovation Center for Materials Genome Engineering,University of Science and Technology Beijing,Beijing,100083,China
4.Department of Orthopaedics,Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases,Shanghai Institute of Traumatology and Orthopaedics,Ruijin Hospital,Shanghai Jiao Tong University School of Medicine,Shanghai,197 Ruijin 2nd Road,200025,China

Huang，Yuhe,Gao，Junheng,Wang，Shuize,et al. Influence of tantalum composition on mechanical behavior and deformation mechanisms of TiZrHfTax high entropy alloys[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2022,903.

Huang，Yuhe.,Gao，Junheng.,Wang，Shuize.,Guan，Dikai.,Xu，Yidong.,...&Todd，Iain.(2022).Influence of tantalum composition on mechanical behavior and deformation mechanisms of TiZrHfTax high entropy alloys.JOURNAL OF ALLOYS AND COMPOUNDS,903.

Huang，Yuhe,et al."Influence of tantalum composition on mechanical behavior and deformation mechanisms of TiZrHfTax high entropy alloys".JOURNAL OF ALLOYS AND COMPOUNDS 903(2022).