Review

A brief review on fracture behaviours and mechanisms of dual-phase steels

¹ Jiang Dong Fittings Equipment Co., Ltd., Nantong 226463, PR China
² Jiangsu Zhongtian Technology Co., Ltd., Nantong 226009, PR China
³ School of Mechanical Engineering, Nantong University, Nantong 226019, PR China
⁴ School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China

^* e-mail: xiesh@ztt.cn

Received: 15 March 2025
Accepted: 14 May 2025

Abstract

This paper is a review of studies dealing with fracture mechanisms in dual-phase (DP) steels. DP steels have become increasingly significant in automotive and other engineering applications due to their advantageous combination of high strength and excellent ductility. This paper reviews the recent progress in studying fracture of DP steels, more specifically on how the morphology and distribution of martensite within the ferrite matrix influence the failure modes and mechanical properties. Key findings indicate that a uniform distribution of martensite enhances ductility and reduces damage growth rates, while factors such as ferrite grain size and stress triaxiality play critical roles in void nucleation and growth. The review also covers recent advancements in numerical modeling techniques, which provide deeper insights into the underlying mechanisms of fracture. Finally, this paper summarized existing research limitations.