【摘要】 本文研究了新型超低间隙钛合金ＴＡ７－Ｄ（Ｔｉ－５ＡＬ－２．５Ｓｎ）在低温（１２Ｋ、２０Ｋ、７７Ｋ）及室温条件下的拉伸性能．实验结果表明，降低合金中间隙元素的含量，在基本不影响材料强度的前提下，有效地提高了材料的低温韧性．通过组织结构分析，较好地解释了ＴＡ７－Ｄ铁合金低温力学性能提高的原因．更多还原

【Abstract】 Abstract In this peper, the tensile properties of new ELI Ti Alloy (Ti-SAl-2. 5Sn)at cryogenic temperatures (12K, 20K, 77K) and room temperature are studied. The experimental results indicat that the toughness of this alloy is increased effectivily without effect of the strength at low temperatures to reduce theintermediate element conments. And the raises of cryogenic mechanical properties of ELI Ti Alloy are explained by the analysis of form and structure更多还原