Prediction of the local deformation mechanisms in metastable austenitic steels from the local concentration of the main alloying elements
Prediction of the local deformation mechanisms in metastable austenitic steels from the local concentration of the main alloying elements
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DOI：
10.1016/j.matlet.2015.06.087
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发表时间：
2015-11
影响因子：
3
通讯作者：
S. Martin;O. Fabrichnaya;D. Rafaja
中科院分区：
文献类型：
--
作者：
S. Martin;O. Fabrichnaya;D. Rafaja
高合金奥氏体钢中不同变形机制的激活强烈依赖于合金元素的浓度，因为它们改变了马氏体相变的驱动力和奥氏体层错能。因此，局部化学梯度极大地改变了局部变形行为。在这一贡献中，阐明了局部化学成分、奥氏体吉布斯能与α‘-马氏体吉布斯能差、马氏体起始温度、层错能、观察到的层错密度与主要变形机制之间的关系。
The activation of different deformation mechanisms in high-alloy austenitic steels depends strongly on the concentration of the alloying elements, as they change the driving force for the martensitic phase transformation and the stacking fault energy in the austenite. Consequently, local chemical gradients alter the local deformation behaviour tremendously. In this contribution, the correlations between the local chemical composition, the corresponding difference between the Gibbs energies of austenite and α′-martensite, martensite start temperature, stacking fault energy, observed stacking fault density and the prevailing deformation mechanism are illustrated.