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http://dx.doi.org/10.5916/jkosme.2008.32.6.938

High Temperature Deformation Behavior of Fe-base High Strength Alloys  

Kwon, Woon-Hyun (한국해양대학교 재료공학과)
Choi, Il-Dong (한국해양대학교 기계소재공학부)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.32, no.6, 2008 , pp. 938-946 More about this Journal
Abstract
Fe-base amorphous alloy and two crystalline phases composite were fabricated. The effect of temperature and strain rate on mechanical properties was evaluated utilizing compression test. Mixture of non-crystalline and crystalline phases were found using X-ray diffraction (XRD) and differential thermal analysis (DTA) tests. Based on glass transition temperature and crystallization temperature. compression tests were performed in the temperature ranging from $560^{\circ}C$ to $700^{\circ}C$ with $20^{\circ}C$ interval. Relationship between microstructure, including fracture surface morphology, and mechanical behavior was studied. The peak stress of Fe-base amorphous alloy was over 2GPa and expected to have a good wear resistance, but it is expected hard to deform because of low ductility. The peak stress and elongation of two crystalline phases composite was over 1GPa and about 20%, therefore it is possible to deform high strength wear resistant materials such as engine valve.
Keywords
High strength; Temperature; Strain rate; Amorphous alloy;
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