Aging Process during Creep Deformation in an Al-Mg-Si Alloy Affected by Pre-Aging Condition

Abstract:

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Creep behavior of an Al-0.3%Mg-0.5%Si alloy affected by pre-aging condition was investigated to obtain fundamental knowledge on the thermal stability in the service temperature range for the precipitation-hardened aluminum heat-exchanger. The alloy was aged at 175 °C for 3 h (under-aged) and 24 h (peak-aged), after solution treatment, and then subjected to creep testing at temperatures of 150 °C and 200 °C. When the creep temperature was 150 °C, the under-aged (UA) specimen showed a lower creep rate than that of the peak-aged (PA) specimen. On the other hand, when the creep temperature was 200°C, both specimens showed almost the same creep rate. In other words, the UA specimen had higher creep resistance than the PA specimen at 150 °C, whereas this advantage disappeared at 200 °C. The difference was thought to originate from the precipitation during creep testing.

Info:

Periodical:

Materials Science Forum (Volumes 794-796)

Edited by:

Knut Marthinsen, Bjørn Holmedal and Yanjun Li

Pages:

261-266

DOI:

10.4028/www.scientific.net/MSF.794-796.261

Citation:

M. Ando et al., "Aging Process during Creep Deformation in an Al-Mg-Si Alloy Affected by Pre-Aging Condition", Materials Science Forum, Vols. 794-796, pp. 261-266, 2014

Online since:

June 2014

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Price:

$38.00

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