Achieving strength-ductility synergy in nanotwinned steels prepared by cryogenic deformation

Jing, Tengfei; Dong, Shaodi; Shen, Lin; Peng, Huabei; Wen, Yuhua

doi:10.1016/j.matchar.2022.112512

Cited by 3 publications

(1 citation statement)

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“…To achieve a combination of high yield strength, strong strain hardening capability, and high uniform elongation, it is necessary for the dynamic phase transformation/twinning to proceed relatively slowly and continuously within a wide range of strains while maintaining the transformation/twinning degree of the β matrix almost unchanged. This can be achieved through various methods such as ω phase precipitation [5,18,51], α phase precipitation [17], and pre-straining induced twinning [52,53]. These methods create obstacles that impede the propagation of the stress-induced martensite and deformation twinning, thus slowing down the dynamic phase transformation/twinning kinetics.…”

Section: Deformation Mechanisms and Strain Hardening Behaviormentioning

confidence: 99%

A Review of Deformation Mechanisms, Compositional Design, and Development of Titanium Alloys with Transformation-Induced Plasticity and Twinning-Induced Plasticity Effects

Fu,

Gao,

Jiang

et al. 2024

Metals

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Metastable β-type Ti alloys that undergo stress-induced martensitic transformation and/or deformation twinning mechanisms have the potential to simultaneously enhance strength and ductility through the transformation-induced plasticity effect (TRIP) and twinning-induced plasticity (TWIP) effect. These TRIP/TWIP Ti alloys represent a new generation of strain hardenable Ti alloys, holding great promise for structural applications. Nonetheless, the relatively low yield strength is the main factor limiting the practical applications of TRIP/TWIP Ti alloys. The intricate interplay among chemical compositions, deformation mechanisms, and mechanical properties in TRIP/TWIP Ti alloys poses a challenge for the development of new TRIP/TWIP Ti alloys. This review delves into the understanding of deformation mechanisms and strain hardening behavior of TRIP/TWIP Ti alloys and summarizes the role of β phase stability, α″ martensite, α′ martensite, and ω phase on the TRIP/TWIP effects. This is followed by the introduction of compositional design strategies that empower the precise design of new TRIP/TWIP Ti alloys through multi-element alloying. Then, the recent development of TRIP/TWIP Ti alloys and the strengthening strategies to enhance their yield strength while preserving high-strain hardening capability are summarized. Finally, future prospects and suggestions for the continued design and development of high-performance TRIP/TWIP Ti alloys are highlighted.

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