Roles of austenite twin and ferrite in bainite transformation of 42CrMo steel

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

Materials Letters Pub Date : 2025-03-03 DOI:10.1016/j.matlet.2025.138333

Jianjun Qi , Zhixin Zhang , Guanwen Dai , Xianming Zhao , Zhenhua Wang

引用次数: 0

Abstract

Steel often contains a bainite microstructure or a multiphase microstructure containing bainite, but bainite transformation is a complex process influenced by multiple factors. In this study, the roles of austenite twin and ferrite in the bainite transformation are investigated by electron backscatter diffraction, using 42CrMo steel as the model material. The bainite that forms on an austenite twin boundary is found to have up to three orientations. Bainite predominantly grows within the twin owing to the constraint of the twin boundaries. Bainite can nucleate adjacent to pre-existing ferrite with several degrees of misorientation; in the transition region between phases, the average increasing rate of misorientation is ∼ 2.6°/μm.

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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