Effect of telmperature and strain rate on tensile behaviour of M250 maraging steel
作者:
VenkatanarayanaG.,
ArumughamS.,
LakshmananT. S.,
Prasad RaoP.,
期刊:
Materials Science and Technology
(Taylor Available online 1996)
卷期:
Volume 12,
issue 7
页码: 607-609
ISSN:0267-0836
年代: 1996
DOI:10.1179/mst.1996.12.7.607
出版商: Taylor&Francis
数据来源: Taylor
摘要:
AbstractThe effect of temperature and strain rate on the 0·2% yield strength, ultimate tensile strength, and percentage elongation of M250 maraging steel was investigated under uniaxial tensile conditions in the temperature range from 25 (room temperature) to 550°C and strain rate range 10−4–10−1S−l. Up to 400°C the steel shows essentially strain rate insensitive behaviour with a gradual decrease in the 0·2% yield strength and ultimate tensile strength. The elongation remains constant at all strain rates up to 300°C. Fractographic analysis indicates that the increasing strain rate induces strain constraint resulting in an increased dimple size. An elongated structure was observed at temperatures above 400°C. X-ray diffraction reveals the presence of reverted austenite in the specimens tested at 550°C.MST/3263
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