Positive strain rate dependence: optimizing TRIP effect for high-speed deformation in lean duplex stainless steel

Autor:	Yongxin Wang, Lei Chen, Xingzhou Cai, Motomichi Koyama, Zhenting Wang, Xiaolong Li, Zhikun Bai, Xiaocong Ma, Miao Jin
Jazyk:	angličtina
Rok vydání:	2024
Předmět:	Lean duplex stainless steel strain rate austenite stability Transformation-Induced Plasticity (TRIP) effect fracture behavior Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Pp 1-9 (2024)
Druh dokumentu:	article
ISSN:	21663831 2166-3831
DOI:	10.1080/21663831.2024.2415903
Popis:	We developed a unique lean duplex stainless steel with a highly unstable austenite phase, exhibiting positive strain rate dependence in tensile properties. Specifically, increased strain rates enhanced the strength-ductility synergy. Adiabatic heating was actively utilized to stabilize austenite, extending the TRIP effect over a wide strain range and maintaining high strain hardening rates until a large strain particularly at high strain rates. Additionally, brittle cracking in ferrite and martensite was significantly reduced with increasing strain rate, resulting in a brittle-to-ductile transition. This discovery offers novel insights into alloy design strategies for metastable steels, improving production efficiency in forming processes.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/cdc9f121598644c593fec8e401dbb99b Zobrazit plný text záznamu View record in DOAJ