材料及构件在低温及交变温度下的服役行为研究

白海洋 丁大伟 高选乔 汪卫华

摘 要：ZrTiAlV合金具有较低的密度和优异的力学性能，使其有可能代替传统材料作为空間活动构件的新型材料使用。该研究应用超声测量技术重点研究了模拟太空交变温度条件循环处理对ZrTiAlV合金弹性模量的影响，人们发现，-196 ℃～200 ℃范围内交变温循环处理可以提高该合金的弹性模量和硬度，而且随着循环次数的增加，这些力学参数呈现出递增的趋势。该研究认为，这是该新型Zr合金有足够的潜力成为空间飞行器长寿命关键部件材料的一项重要性能。

关键词：ZrTiAlV合金 低温 弹性模量

Abstract：ZrTiAlV alloys have low density and excellent mechanical properties.Thus this makes it possible to replace traditional materials as moving components in spacecraft.This paper focuses on the application of ultrasonic measurement technique to simulate space alternating temperature cycle treatment on ZrTiAlV alloy elastic modulus.We found that treatment cycle alternating temperature within the range of -196 ℃～200 ℃ can increase the elastic modulus of the alloy and hardness，but also increases the number of cycles， these mechanical parameters showing increasing trend. We believe that this is the new Zr alloys have enough potential to be an important long-life performance of the key components of spacecraft materials.

Key Words：ZrTiAlV alloy；Low temperature；Elastic modulus

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