Phase transformation and mechanical properties of Ti50Ni50 alloy after high-velocity impact

Phase transformation and mechanical properties of Ti50Ni50 alloy after high-velocity impact
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Ti50Ni50合金高速冲击后的相变及力学性能

DOI:
10.1016/j.jallcom.2015.12.235
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发表时间:
2016-04
影响因子:
6.2
通讯作者:
Zhiyong Gao
Zhiyong Gao
中科院分区:
材料科学2区
文献类型:
--
作者:
Yingying Zhu;Haizhen Wang;Zhiyong Gao

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为了模拟空间碎片的撞击,使用火药枪以1.2 km s-1的速度撞击Ti 50 Ni 50合金。研究了Ti 50 Ni 50合金的冲击相变、组织和力学性能。结果表明,Ti 50 Ni 50合金经冲击后,相变温度向低温方向移动。变体失去了自适应形态,马氏体片变宽,变体界面在力的作用下发生迁移和弯曲,马氏体片中存在许多位错。随着离板条箱距离的增加,显微硬度逐渐降低,形状恢复率逐渐提高。这是由于高速冲击引起的塑性变形和加工硬化造成的。
To simulate the impact of space debris, Ti50Ni50alloy is impacted at 1.2 km s−1using a powder gun. Phase transformation, microstructure and mechanical properties in Ti50Ni50alloy induced by impact are investigated. The results show that the phase transformation temperature shifts to a lower temperature in impacted Ti50Ni50alloy. Variants lose their self-accommodated morphology, martensite plates widen, the variants interfaces migrate and bend under force, and many dislocations exist in the martensite plates. The microhardness reduces and the shape recovery ratio enhances gradually with the increase in distance from the crate. This is attributed to plastic deformation and working hardening caused by high-velocity impact.
DOI: 10.1016/s0925-8388(02)00982-9
发表时间: 2003-02
影响因子: 6.2
作者:
H. Matsumoto
通讯作者: H. Matsumoto
DOI: 10.1016/j.jallcom.2013.05.092
发表时间: 2013-12
影响因子: 6.2
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