Stress-induced martensitic transformation and impact toughness of cast irons and high-carbon Fe-Ni-C steel |
| |
Authors: | M -X Zhang P M Kelly |
| |
Affiliation: | (1) the Department of Mining, Minerals and Materials Engineering, University of Queensland, 4072 ST. Lucia, QLD, Australia |
| |
Abstract: | The relationship between the impact toughness and stress-induced martensitic transformation, which occurs during the impact
process, has been studied in white cast irons and an Fe-Ni-C alloy at different temperatures. The experimental results have
shown that in the brittle white cast irons, the stress-induced martensitic transformation makes a positive contribution to
the impact toughness, and lowering the stability of austenite increases the toughness. In contrast, the transformation makes
a negative contribution to the toughness of high-carbon austenitic steels, and lowering the stability of austenite decreases
the toughness. The present work supports the early theory1] that the magnitude of the toughness change depends on the fracture properties of the new phase and the energy being dissipated
during the transformation process. Using the crystallographic model for the stress-induced martensitic transformation, which
was originally developed in ceramics and was then refined and extended to irons and steels, the effect of the stress-induced
martensitic transformation on the impact toughness can be predicted. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|