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Iranian Journal of Materials Forming، جلد ۶، شماره ۱، صفحات ۱۶-۲۳
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عنوان انگلیسی Microstructure and its Relationship to Mechanical Properties in Equal Channel Angular Rolled Al6061 Alloy Sheets
چکیده انگلیسی مقاله Equal channel angular rolling (ECAR) is a sever plastic deformation (SPD) technique which has been used to produce metal sheets with ultra-fine grain structure. In the present work, the relationships between mechanical properties and microstructure of samples during ECAR process have been investigated. The Rietveld method was applied to analyze X-ray diffraction pattern and to determine the microstructural characteristics including the crystallite size, microstrain, and dislocation density. It was observed that the average crystallite size and dislocations density were increased with increasing the strain during the ECAR process. The results showed that ECAR is a procedure used for the intention of obtaining meaningful structural refinement appearing in a crystallite. It can be justified by using Taylor equation that the mechanical properties are related to the dislocation density. The ECAR process strongly increases the yield strength and microhardness due to an increase of dislocation density over a wide range of strain.
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نویسندگان مقاله M Mahmoodi |
School of Mechanical Engineering, Semnan University, Semnan, Iran

A Naderi |
School of Mechanical Engineering, Semnan University, Semnan, Iran

نشانی اینترنتی http://ijmf.shirazu.ac.ir/article_5195_455bad4532b7de1321a087dd8b2029a7.pdf
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/453/article-453-1557033.pdf
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