期刊
JOURNAL OF MATERIALS SCIENCE
卷 48, 期 6, 页码 2635-2646出版社
SPRINGER
DOI: 10.1007/s10853-012-7057-z
关键词
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资金
- J. William Fulbright Foreign Scholarship Board (FSB)
- US Department of State's Bureau of Educational & Cultural Affairs (ECA)
- Government of India, Council of Scientific and Industrial Research (CSIR)
- Institute of International Education (IIE)
- United States-India Educational Foundation (USIEF)
- Fulbright-Nehru Doctoral & Professional Research Fellowship vide Grant [1369/DPR/2010-2011]
Superplastic behavior of a solution treated and friction stir processed (FSP) AZ91C alloy is studied. These studies are conducted in the temperature range of 300-375 A degrees C and strain rates (SRs) in the range of 1 x 10(-4)-3 x 10(-3) s(-1). Microstructural stability of the FSP alloy is also studied in comparison to the AZ31, AZ61, and AZ91 alloys processed by various routes. High SR sensitivity in the range of 0.33-0.39 and grain size stability till 350 A degrees C is observed for the FSP alloy. The FSP AZ91C alloy showed better thermal stability in comparison to AZ31 and AZ61 alloys. Kinetics of superplastic deformation of the FSP alloy is found to be slower as compared to AZ31 and AZ61 alloys processed by various routes, which is due to the presence of significant amount of second phase precipitates, such as, beta-Mg-17(Al,Zn)(12), Mg2Si, and Al8Mn5 in the FSP alloy. However, these precipitates contributed for better thermal stability of the microstructure of FSP AZ91C alloy.
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