THE EFFECT OF SEVERE PLASTIC DEFORMATION ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF AS-CAST AZ۳۱
Publish Year: 1395
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJMSEI-13-3_004
تاریخ نمایه سازی: 26 مرداد 1402
Abstract:
The evolution of microstructure and mechanical properties of a magnesium cast alloy (AZ۳۱) processed by equal channel angular pressing (ECAP) at two different temperatures were investigated. The as-cast alloy with an average grain size of ۳۶۰ was significantly refined to about ۵ after four ECAP passes at ۵۴۳ K. Grain refinement was achieved through dynamic recrystallization (DRX) during the ECAP process in which the formation of necklace-type structure and bulging of original grain boundaries would be the main mechanisms. ECAP processing at lower temperature resulted in finer recrystallized grains and also a more homogenous microstructure. The mechanical behavior was investigated at room temperature by tensile tests. The obtained results showed that the ECAP processing can basically improve both strength and ductility of the cast alloy. However, the lower working temperature led to higher yield and ultimate strength of the alloy.
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Authors
S. Khani
School of Materials and Metallurgical Engineering, Iran University of Science and Technology
M. T. Salehi
School of Materials and Metallurgical Engineering, Iran University of Science and Technology
H. R. Samim
School of Materials and Metallurgical Engineering, Iran University of Science and Technology
M. R. Aboutalebi
Center of Excellence for Advanced Materials and Processing (CEAMP), School of Materials and Metallurgical Engineering, Iran University of Science and Technology
H. Palkowski
Institute of Metallurgy, Clausthal University of Technology
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