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Superplastic behavior and microstructural stability of friction stir processed AZ91C alloy

IR@NPL: CSIR-National Physical Laboratory, New Delhi

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Title Superplastic behavior and microstructural stability of friction stir processed AZ91C alloy
 
Creator Jain, Vipin
Mishra, Rajiv S.
-, Gouthama
 
Subject Materials Science
 
Description 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.
 
Publisher Springer Verlag
 
Date 2013-03
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://npl.csircentral.net/3019/1/Superplastic%20behavior%20and%20microstructural.pdf
Jain, Vipin and Mishra, Rajiv S. and -, Gouthama (2013) Superplastic behavior and microstructural stability of friction stir processed AZ91C alloy. Journal of Materials Science, 48. pp. 2635-2646. ISSN 0022-2461
 
Relation http://npl.csircentral.net/3019/