Effect of Pre-Strain on Mechanical Properties and Martensitic Transformation of S30408 Stainless Steel
In order to explore the change rule of the mechanical properties of S30408 stainless steel under different pre-strain,and provide reference for reasonable evaluation of deformation behavior of related components.In this paper,uniaxial tensile tests were carried out on S30408 stainless steel under different pre-strain at room temperature.The influence of pre-strain on the mechanical properties and martensitic transformation were studied.On the basis,the constitutive models considering pre-strain including modified Ludwigson were constructed.Combined with the embrittlement model based on Johnson-Cook model,the mechanical properties of the materials after pre-strain were reasonably predicted.The results show that the yield strength of S30408 stainless steel increases obviously,the tensile strength increases slowly,and the elongation decreases with the increase of the pre-strain.The microstructure and precipitated phase composition with different pre-strain were analyzed through metallographic analysis and X-ray diffraction experiment.The deformation included martensitic transformation of S30408 stainless steel appears gradually,when the pre-strain reaches 9%.Finally,the stress-strain relationship of S30408 stainless steel with different pre-strain is reasonably predicted.
S30408 stainless steelpre-straincold deformation strengtheningmartensitic transformationconstitutive model
国家科技期刊平台
NSTL
万方数据
维普
