Effects of Melt Holding Time on as Cast Microstructure and Tensile Properties of Sr-Modified AS31Alloy

Jin Wei Wang; Ji Xue Zhou; Bai Chang Ma; Shou Qiu Tang; Fu Min Chu; Yuan Sheng Yang

doi:10.4028/www.scientific.net/AMM.697.67

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 697Effects of Melt Holding Time on as Cast...

Effects of Melt Holding Time on as Cast Microstructure and Tensile Properties of Sr-Modified AS31Alloy

Abstract:

Melt holding time has important influences on the modification effect of Sr modified AS31 alloy. Effects of different melt holding time (30min, 60min, 90min and 120min) at 700°C on as cast microstructure and tensile properties both at ambient temperature and elevated temperature of Sr-modified AS31 alloy were studied. There exist polyhedral shape, fine fibers shape and a few Chinese script Mg2Si particles in Sr-modified AS31 alloys. And the average grain size is smallest in Sr-modified AS31 alloys with holding time at 700°C for 30min. The ultimate strength, yield strength and elongation at both ambient temperature and 150°C decrease gradually when the melt holding time increases from 30min to 120min. In the process of smelting of Sr-modified AS31. The burning loss of Sr element becomes more serious with the prolongation of melt holding time, which contributes to the modification effect reducing.

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Periodical:

Applied Mechanics and Materials (Volume 697)

Pages:

67-71

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.697.67

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Online since:

November 2014

Authors:

Jin Wei Wang*, Ji Xue Zhou, Bai Chang Ma, Shou Qiu Tang, Fu Min Chu, Yuan Sheng Yang

Keywords:

Melt Holding Time, Microstructure, Sr-Modified AS31, Tensile Properties

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