Softening during simple shear extrusion (SSE) of pure copper

سال انتشار: 1395
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 544

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شناسه ملی سند علمی:

IMES10_432

تاریخ نمایه سازی: 6 اردیبهشت 1396

چکیده مقاله:

In the present paper softening during SSE processing has been investigated by microstructural investigations, hardness measurements and tensile tests. For this reason, TEM was used for microstructural observations. The strain softening happens as a result of the reduction in the dislocation density and strain induced grain growth. Also, a decrease in hardness and yield strength and an increase in the uniform elongation is observed after softening. Two stages for softening were observed. First, at the middle of the deformation channel in each passes of SSE and second after eight passes of SSE. The mechanism for the latter is the stress coupled grain-boundary migration while the former happens as a result of shear reversal

نویسندگان

Ebad Bagherpour

Faculty of Metallurgical and Materials Engineering, Semnan University, Semnan, Iran

Fathallah Qods

Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran

Ramin Ebrahimi

Department of Mechanical Engineering, Doshisha University, Kyotanabe, Kyoto 610-0394, Japan

Hiroyuki Miyamoto

Professor, Department of Mechanical Engineering, Doshisha University, Kyotanabe, Kyoto 610-0394, Japan.

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