Abstract
In this contribution, we investigate the influence of thermal processing routes on the formability of medium Mn steel by assessing the strain hardening coefficient and anisotropy factor using the uniaxial tensile test. Medium Mn steel processed by intercritical annealing (IA) at 680 °C for 4 h demonstrates better formability than steel treated with a combination of IA at 800 °C for 10 min and quenching and partitioning (Q&P), based on the much higher strain hardening coefficient (n) and comparable anisotropy factor (r, rm, ∆r). The higher strain hardening coefficient of medium Mn steel with single IA treatment is ascribed to the enhanced transformation-induced plasticity (TRIP) effect resulting from the large amount of austenite that is transformed into martensite during deformation. In addition, the IA process allows for the production of medium Mn steel with high ductility, which is beneficial for its high formability and good ‘part ductility’ in lightweight automotive applications.
Funder
National Natural Science Foundation of China
Science and Technology Innovation Commission of Shenzhen
Subject
General Materials Science
Reference38 articles.
1. Driving Force and Logic of Development of Advanced High Strength Steels for Automotive Applications;Bouaziz;Steel Res. Int.,2013
2. High dislocation density-induced large ductility in deformed and partitioned steels;He;Science,2017
3. New generation ultrahigh strength boron steel for automotive hot stamping technologies;Taylor;Mater Sci. Tech-Lond.,2013
4. Development of Advanced High Strength Automotive Steels;Tisza;Acta Mater. Transylvanica Magy. Kiadás,2021
5. Newby, J.R., and Niemeier, B. (1982). Formability of Metallic Materials-2000 AD, ASTM International.
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献