Transformation-induced plasticity in omega titanium

被引：9
|
作者：
Zahiri, Amir Hassan [1 ]
Ombogo, Jamie [1 ]
Ma, Tengfei [1 ]
Chakraborty, Pranay [1 ]
Cao, Lei [1 ]
机构：
[1] Univ Nevada, Dept Mech Engn, Reno, NV 89557 USA
来源：
JOURNAL OF APPLIED PHYSICS | 2021年 / 129卷 / 01期
基金：
美国国家科学基金会;
关键词：
SINGLE-CRYSTAL TITANIUM; MOLECULAR-DYNAMICS; PHASE-TRANSFORMATION; ZIRCONIUM; BEHAVIOR; METALS; ALLOYS; TWINS;
D O I：
10.1063/5.0035465
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
omega -titanium (Ti) is a high-pressure phase that is conventionally perceived to be brittle and nondeformable, although direct investigations of its deformation process remain scarce. In this work, we perform molecular dynamics simulations to study the deformation process of omega -Ti with initial defects and find that stress-induced omega -> alpha martensitic transformation can cause extensive plasticity in omega -Ti under various loading directions. Moreover, for the first time, we demonstrate that four types of transformation twins- { 11 2 1 }, {11 2 2 }, {10 1 2 }, and {10 1twins-can be formed through the omega -> alpha martensitic phase transformation. This work advances the understanding of plastic deformation in omega -Ti and unveils the essential role of the metastable omega -phase in the formation of transformation twins.
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页数：12
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