Microscale deformation of a tempered martensite ferritic steel: Modelling and experimental study of grain and sub-grain interactions

详细信息    查看全文

• 作者：Brian J. Golden^a ; ^d ; ^{brian.golden@ul.ie" class="auth_mail" title="E-mail the corresponding author} ; Dong-Feng Li^e ; ^{dong-feng.li@nuigalway.ie" class="auth_mail" title="E-mail the corresponding author} ; Yina Guo^d ; ^{yina.guo@ul.ie" class="auth_mail" title="E-mail the corresponding author} ; Peter Tiernan^c ; ^d ; ^{peter.tiernan@ul.ie" class="auth_mail" title="E-mail the corresponding author} ; Sean B. Leen^b ; ^{sean.leen@nuigalway.ie" class="auth_mail" title="E-mail the corresponding author} ; Noel P. O'Dowd^a ; ^d ; ^{noel.o'dowd@ul.ie" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Mesoscale modelling ; Strain gradient crystal plasticity ; Tempered martensitic steels
• 刊名：Journal of the Mechanics and Physics of Solids
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：86
• 期：Complete
• 页码：42-52
• 全文大小：3315 K

文摘

In this paper, a finite-element modelling framework is presented with explicit representation of polycrystalline microstructure for a tempered martensite ferritic steel. A miniature notched specimen was manufactured from P91 steel with a 20,000 h service history and tested at room temperature under three point bending. Deformation at the microscale is quantified by electron back scattered diffraction (EBSD) before and after mechanical loading. A representative volume element was developed, based on the initial EBSD scan, and a crystal plasticity model used to account for slip-based inelastic deformation in the material. The model showed excellent correlation with the experimental data when the relevant comparisons were made.