Superior Mechanical Properties and Work-Hardening Ability of Ultrafine-Grained Quenched and Partitioned Steels Processed by a Novel Approach Involving Asymmetric Hot Rolling
Zhengyou Tang,
Jianeng Huang,
Xingchao Lu,
Hua Ding,
Dongmei Zhang,
Devesh Misra
Affiliations
Zhengyou Tang
School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
Jianeng Huang
School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
Xingchao Lu
School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
Hua Ding
School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
Dongmei Zhang
Shenyang Liming Aero-Engine Corporation, AECC, Shenyang 110043, China
Devesh Misra
Laboratory for Excellence in Advanced Steel Research, Department of Metallurgical, Materials and Biomedical Engineering, University of Texas at El Paso, El Paso, TX 79968, USA
An approach is proposed to enhance the mechanical properties and work-hardening (WH) ability of low-alloy steels. Using asymmetric hot rolling (AHR) and subsequent direct quenching (DQ) prior to the quenching and partitioning (Q&P) process, an ultrafine-grained Q&P steel with excellent combination of tensile strength of ~1000 MPa and total elongation of ~35% was obtained, which exhibited high WH exponent at higher strain induced by the higher volume fraction and higher stability of film-like retained austenite located between the martensite laths.
