材料及構件在低溫及交變溫度下的服役行為研究

白海洋 丁大偉 高選喬 汪衛華

摘 要：ZrTiAlV合金具有較低的密度和優異的力學性能，使其有可能代替傳統材料作為空間活動構件的新型材料使用。該研究應用超聲測量技術重點研究了模擬太空交變溫度條件循環處理對ZrTiAlV合金彈性模量的影響，人們發現，-196 ℃～200 ℃范圍內交變溫循環處理可以提高該合金的彈性模量和硬度，而且隨著循環次數的增加，這些力學參數呈現出遞增的趨勢。該研究認為，這是該新型Zr合金有足夠的潛力成為空間飛行器長壽命關鍵部件材料的一項重要性能。

關鍵詞：ZrTiAlV合金 低溫 彈性模量

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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