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Effect of Deep Cryogenic Treatment on Microstructure and Properties of AE42 Mg Alloy

Bhale, Pranav and Shastri, H and Mondal, AK and Masanta, M and Kumar, S (2016) Effect of Deep Cryogenic Treatment on Microstructure and Properties of AE42 Mg Alloy. In: JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 25 (9). pp. 3590-3598.

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Official URL: http://dx.doi.org/10.1007/s11665-016-2238-6

Abstract

The effect of deep cryogenic treatment (DCT) on microstructure and mechanical properties including corrosion behavior of the squeeze-cast AE42 alloy has been investigated. For comparison, the same has also been studied on the untreated alloy. Both the untreated and deep cryogenic-treated (DCTed) alloys comprised alpha-Mg and Al4RE phases. Volume fraction of the Al4RE phase in the AE42 alloy reduced gradually following DCT carried out from 4 to 16 h. Ductility and UTS increase significantly with a marginal increase in YS of all the DCTed alloys. The improvement was attributed to the dissolution of the brittle Al4RE phase following DCT. Among the alloys employed, the best tensile properties were obtained for the 16-h DCT alloy due to its lowest content of the brittle Al4RE phase. Creep resistance of the DCTed alloys was lower than that of the untreated alloy owing to the presence of less amount of thermally stable intermetallic Al4RE phase. Wear resistance of the alloy reduces following DCT due to reduced hardness of the DCTed alloys. The untreated alloy exhibits the best corrosion resistance, whereas poor corrosion resistance of the DCTed alloys is attributed to the reduced amount of Al4RE phase that fails to built a corrosion resistance barrier.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 22 Oct 2016 09:18
Last Modified: 22 Oct 2016 09:18
URI: http://eprints.iisc.ac.in/id/eprint/55009

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