On the anomalous strain rate dependence of working hardening and fracture behavior of an ultra-high strength 1470 MPa dual phase steel

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-02-02 DOI:10.1016/j.matlet.2025.138172

Shuangjie Chu , Qian Liu , Bohao Zhou , Yanhui Wang , Guangkui Hu , Bo Mao

引用次数: 0

Abstract

Dual phase (DP) steels are among the most widely used automotive steels due to their excellent synergic engineering performance. In this paper, the strain-hardening and fracture behavior of a commercial highest grade DP1470 steels were investigated by performing quasi- and high-speed tensile tests with a strain rate ranging from 10^-4 to 10²/s. It is notable that the tensile strength and total elongation of DP1470 are insensitive to the strain rate, while the latter affects the fracture mechanism significantly. Microstructural and fractography analysis were carried out to reveal the deformation and failure mechanism. This intriguing behavior is associated with the distinct mechanical response of ferrite and martensite to strain rate, together with the high martensite volume fraction.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive