Tensile properties of cold-rolled TWIP-cored three-layer steel sheets
作者： Jaeyeong Park , Minju Kang , Seok Su Sohn , Jung-Su Kim , Hyoung Seop Kim
DOI: 10.1016/J.MSEA.2017.01.046
关键词:
摘要: Abstract In this study, TWIP-cored three-layer steel sheets containing thin surface layers of low-carbon (LC) or interstitial-free (IF) were fabricated by solid-state hot-roll-bonding followed cold-rolling. Interfaces well bonded without any pores voids, which indicated a successful fabrication the sheets. According to tensile test results, both strength and elongation increased proportionally with volume fraction region, matched calculated rule mixtures. However, yield point (YP) was observed in most as mono-layer TWIP LC After quenched from 830 °C, YP disappeared because dislocation density greatly effects thermal stresses formed during rapid cooling. A bainitic microstructure, generally characterized continuous yielding, along TWIP/LC TWIP/IF interfaces, also beneficially influenced elimination YP. These covered wide range ductility levels requiring automotive controlling thus present new applications multi-functional
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