期刊
METALS
卷 12, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/met12030443
关键词
TRIP steel; retained austenite; scanning electron microscopy; X-ray diffraction; Vickers hardness; car body material
This paper presents a comparison between four TRIP steels belonging to two different groups. Through heat treatment and impact bending test, it was found that two steels from different groups showed similar mechanical shock behaviors and similar proportions of retained austenite transformed into martensite. Additionally, the steel with the highest Mn percentage exhibited the highest hardness and proportions of retained austenite and martensite.
This paper presents a comparison between four TRIP steels, which belong to two groups with different chemical compositions. The first group is that of steels with a relatively low contents of Mn (1.5-2%), high Al (1-2%) and about 0.2% C, and the second includes steels with lower percentages of C (0.1%) and Al (max. 0.6%), but with high percentages of Mn (over 5%). The steels were heat treated by incomplete austenitization, isothermally cooled in salt baths at 400 degrees C, followed by air cooling. The heat-treated samples were subjected to the impact bending test. A comparative study was performed from the point of view of the intensity of the TRIP effect, the development of the retained austenite-to-martensite transformation under shock (studied by SEM), X-ray analysis and hardness measurements. It was found that appropriate and similar behaviors in terms of mechanical shock were shown by two steels belonging to different groups, with similar amounts of the retained austenite being turned into martensite fractions. The steel with the highest Mn percentage was distinguished by having the highest hardness (362 HV) and the highest retained austenite (obtained after heat treatment) and martensite fractions (caused by the TRIP effect) (10.63% and 2.17%, respectively).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据