Analysis of damage-tolerance of TRIP-assisted V10Cr10Fe45Co30Ni5 high-entropy alloy at room and cryogenic temperatures

“…This stage is dominated by the dynamic recovery of dislocations, and the work hardening rate continues to decrease. When the strain is higher (ε > 0.12), as shown in stage ІІ, the second twin variants occur [42]. Stage ІІ is characterized by a progressively elevated or balanced strain hardening rate.…”

Section: Discussionmentioning

confidence: 98%

Effects of cerium addition on the microstructure, mechanical properties and strain hardening behavior of TWIP steel Fe-18Mn-0.6C

Zhong

Wang

Luo

et al. 2022

Materials Characterization

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“…In addition to the FCC-HCP TRIP alloys, unique and interesting FCC-BCC TRIP HEAs have recently been reported for a limited number of compositions. For instance, the non-equiatomic Fe 45 Co 30 Cr 10 V 10 Ni 5-x Mn x (x = 0, 2.5, and 5 at.%) HEA and more recently the V 10 Fe 45 Co 30 Cr 10 Ni 5 alloy both exhibited FCC-BCC TRIP effect at cryogenic temperatures [10,[53][54][55][56][57]. It should be emphasized here that the FCC to BCC martensitic transformation that dominated the response at cryogenic temperatures took place while still maintaining high ductility levels, despite the presence of the BCC phase.…”

Section: Introductionmentioning

confidence: 99%

Deformation Rate and Temperature Sensitivity in TWIP/TRIP VCrFeCoNi Multi-Principal Element Alloy

Batal

Abuzaid

Egilmez

et al. 2022

Metals

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High-entropy alloys (HEAs) and medium-entropy alloys (MEAs), also sometimes referred to as multi-principal element alloys (MPEAs), present opportunities to develop new materials with outstanding mechanical properties. Through the careful selection of constituent elements along with optimized thermal processing for proper control of structure, grain size, and deformation mechanisms, many of the newly developed HEA systems exhibit superior strength and ductility levels across a wide range of temperatures, particularly at cryogenic deformation temperatures. Such a remarkable response has been attributed to the hardening capacity of many MPEAs that is achieved through the activation of deformation twinning. More recent compositions have considered phase transforming systems, which have the potential for enhanced strengthening and therefore high strength and ductility levels. However, the strain rate sensitivity of such transforming MPEAs is not well understood and requires further investigation. In this study, the tensile properties of the non-equiatomic V10Cr10Fe45Co30Ni5 MPEA were investigated at different deformation rates and temperatures ranging from 77 K (−196 °C) to 573 K (300 °C). Depending on the deformation temperature, the considered MPEA exhibits plasticity through either crystallographic slip, deformation twinning, or solid-state phase transformation. At 300 °C, only slip-mediated plasticity was observed for all the considered deformation rates. Deformation twinning was detected in samples deformed at room temperature, while face-centered cubic to body-centered cubic phase transformation became more favorable at cryogenic deformation temperatures. The trends are nonlinear with twinning-induced plasticity (TWIP) favored at the intermediate deformation rate, while transformation-induced plasticity (TRIP) was observed, although limited, only at the slowest deformation rate. For all the considered deformation rates at cryogenic deformation temperature, a significant TRIP activity was always detected. The extent of TRIP, however, was dependent on the deformation rate. Increasing the deformation rate is not conducive to TRIP and thus hinders the hardening capacity.

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Analysis of damage-tolerance of TRIP-assisted V10Cr10Fe45Co30Ni5 high-entropy alloy at room and cryogenic temperatures

Cited by 51 publications

References 64 publications

Microstructural Effects on J‐Integral Fracture Toughness of Welded High‐Mn Steels at 298 and 77 K

Microstructural Effects on J‐Integral Fracture Toughness of Welded High‐Mn Steels at 298 and 77 K

Effects of cerium addition on the microstructure, mechanical properties and strain hardening behavior of TWIP steel Fe-18Mn-0.6C

Deformation Rate and Temperature Sensitivity in TWIP/TRIP VCrFeCoNi Multi-Principal Element Alloy

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