Research on the yield strength model of hot rolled comosite plates based on the erolution of grain and orientation differences
YANG Jianhui
LI Haibin
CHEN Chao
SHUAI Meirong
WANG Qiang
Abstract：This study develops a computational model to predict the yield strength of three-layer stainless steel/carbon steel/stainless steel clad plates based on experimental data from varied hot rolling processes.The two-pass rolling schedule involved a first pass at reduction rates of 25%,30%,and 35%,followed by a second pass at a constant 20%reduction.Results show that increasing the first-pass reduction rate reduced the average grain diameter of the carbon steel substrate from 14.74 μm to 8.95 μm,while the average kernel average misorientation(KAM)initially decreased then increased(1.72°,1.01°,and 1.27°,respectively).Conversely,the average grain diameter of the stainless steel cladding first increased then decreased(23.67 μm,40.49 μm,and 28.64 μm,respectively),with a corresponding increase in average KAM value(0.48°,1.06°,and1.10°).The calculated yield strengths(300.44 MPa,305.25 MPa,and 333.55 MPa)all fell within 7.1%of the experimental values(280.61 MPa,325.83 MPa,and 355.51 MPa),validating the model's accuracy.Analysis confirms that the material's yield strength is simultaneously influenced by grain diameter and KAM,with grain diameter being the predominant factor.Specifically,yield strength is inversely proportional to grain diameter and directly proportional to the KAM value.
Keywords：composite panelsyield strengthgrain diameterkernel average misorientation
Publication Date：2025-09-20
Online Publishing Date：2025-10-28(First online date of this platform, not the publication date of the document)
Pages：6( 1-6 )