Dynamic Properties of LY-12 Aluminium Alloy under High Temperature Condensed StateHigh Temperature Elastic Modulus Measurements
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摘要: 金属材料的高温动态力学性能是材料科学领域中的重要方面。本文介绍LY-12合金铝在常温至450 ℃的温度区间内和动载下（应变率为103/s），材料弹性模量的研究。此项研究采用的试验装置为一维Hopkinson压杆及管式高温炉。应用一维弹性应力波传播理论，测得LY-12铝试件在不同温度T条件下的声速c(T)，按照c(T)=[E(T)/(T)]1/2，获得杨氏模量E(T)随温度的变化曲线。
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关键词:
- Hopkinson压杆 /
- 应力波 /
- 高温弹性模量
Abstract: Dynamic properties of metal materials at high temperatures are quite important in material sciences. This paper describes the elastic modulus measurements of LY-12 aluminium under dynamic loadings and at temperatures up to 450 ℃ by using one dimensional split Hopkinson bar and tubular furnace. With the observed elastic wave velocities c(T) of LY-12 Al at different temperatures, and based on the one dimensional theory of elastic stress wave propagation, the temperature dependence of Young's Models, E(T), of LY-12 Al can be obtained via c(T)=E(T)/T.-
Key words:
- Hopkinson pressure bar /
- stress wave /
- high temperature elastic modulus
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段祝平, 等. 力学进展, 1980, 10(1): 1. 王礼立. 应力波基础(第三章). 北京: 国防工业出版社, 1985. 王春奎, 刘小苹, 等. 强激光与粒子束, 1991, 3(1): 57. 机械设计材料手册编写组. 原子能工业机械设计材料手册. 原子能出版社, 1979: 342. -
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