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A new method of characterizing equivalent strain for equal channel angular processing

Content Provider	Springer Nature Link
Author	Zhao, Jun Wang, Zhen hua Sun, Shu hua Zhao, De li Ren, Li guo Fu, Wan tang
Copyright Year	2009
Abstract	In order to establish the quantitative relationship between equivalent strain and the performance index of the deformed material within the range of certain passes for equal channel angular processing (ECAP), a new approach to characterize the equivalent strain was proposed. The results show that there exists better accordance between mechanical property (such as hardness or strength) and equivalent strain after rolling and ECAP in a certain range of deformation amount, and Gauss equation can be satisfied among the equivalent strain and the mechanical properties for ECAP. Through regression analysis on the data of hardness and strength after the deformation, a more generalized expression of equivalent strain for ECAP is proposed as: ɛ=k $_{0}$exp[−(k $_{1}$ M−k $_{2}$)$^{2}$], where M is the strength or hardness of the material, k $_{1}$ is the modified coefficient (k $_{1}$∈(0, 1)), k $_{0}$ and k $_{2}$ are two parameters dependent on the critical strain and mechanical property that reaches saturation state for the material, respectively. In this expression the equivalent strain for ECAP is characterized novelly through the mechanical parameter relating to material property rather than the classical geometry equation.
Starting Page	349
Ending Page	353
Page Count	5
File Format	PDF
ISSN	10059784
Journal	Journal of Central South University of Technology
Volume Number	16
Issue Number	3
e-ISSN	19930666
Language	English
Publisher	Central South University
Publisher Date	2009-06-09
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	equal channel angular processing (ECAP) equivalent strain mechanical property characterizing method Metallic Materials Engineering
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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A new method of characterizing equivalent strain for equal channel angular processing

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