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近年来,随着航天事业的发展,以液氢及液氧为燃料的火箭的研究受到重视,并开始认识到关于火箭结构材料,特别是火箭贮箱用材料的超低温力学性能之知识的重要性。同时也更加关心获得这些知识的手段的超低温材料试验。特别是拉伸试验,由于能获得很多关于材料的力学性质方面的知识,过去曾进行了在液氢温度下的一些实验,然而在条件更苛刻的液氦温度4.2°k下的实验事例是极少的。本报告之目的在于考
In recent years, with the development of the aerospace industry, the research on rocket fueling with liquid hydrogen and liquid oxygen has drawn great attention and is beginning to recognize the importance of knowledge about the cryogenic mechanical properties of rocket structural materials, especially rocket storage materials . At the same time, more attention is also paid to the cryogenic material testing of the means to obtain this knowledge. In particular, tensile tests have been conducted in the past due to the availability of much knowledge about the mechanical properties of materials. However, the experimental case at the more severe liquid helium temperature of 4.2 ° K is extremely polar Less. The purpose of this report is to test