Effect of pure shear strain on mechanical properties and microstructural evolution

详细信息    查看全文

• 作者：Farhad Rahimi^a ; Ali Reza Eivani^a ; ^{aeivani@iust.ac.ir" class="auth_mail" title="E-mail the corresponding author} ; Hamid Reza Jafarian^a ; Tilak Bhattacharjee^b
• 关键词：Grain refinement ; Pure shear ; Finite element analysis ; Severe plastic deformation
• 刊名：Materials Science & Engineering A
• 出版年：2017
• 出版时间：2 January 2017
• 年：2017
• 卷：679
• 期：Complete
• 页码：133-142
• 全文大小：1943 K

文摘

Strain mode in severe plastic deformation can affect microstructural evolution and mechanical properties of the deformed samples. In the present study, the effect of pure shear deformation on the mechanical properties and microstructural evolution during one cycle of pure shear extrusion (PSE) is investigated. It is observed that imposing pure shear strain via PSE can result in significant grain refinement. Moreover, the mechanical properties of the PSEed sample in terms of hardness and tensile properties are modified. In addition, a grain refinement gradient is also observed from center toward periphery. Finite element analysis is performed to predict the strain distribution pattern during processing and evaluate the homogeneity of deformation. Experimental verification in terms of pressing load and hardness distribution are used to validate the integrity and accuracy of the simulation.