| 微量硼和应变速率对变形TiAl合金室温力学性能的影响 |
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| 引用本文： | 王瑜 林栋梁. 微量硼和应变速率对变形TiAl合金室温力学性能的影响[J]. 中国有色金属学报, 1999, 9(1): 1-7 |
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| 作者姓名： | 王瑜 林栋梁 |
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| 作者单位： | 上海交通大学材料科学系教育部高温材料及高温测试开放实验室 |
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| 基金项目： | 国家自然科学基金,上海交通大学与美国United Technologies-Prat ＆ Whitney公司合作研究项目 |
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| 摘 要： | 以形变Ｔｉ４７Ａｌ２Ｍｎ２Ｎｂ合金为对象，研究了微量硼合金化和应变速率对ＴｉＡｌ合金室温力学性能的影响。发现添加微量（１．０％，摩尔分数）硼就能有效地细化形变Ｔｉ４７Ａｌ２Ｍｎ２Ｎｂ合金的近全片层组织，显著提高其室温强度，并在一定程度上改善室温塑性；变形ＴｉＡｌ合金不论添硼与否，其室温强度均随应变速率的升高而升高，而延伸率对应变速率不太敏感；微量硼合金化和应变速率对变形ＴｉＡｌ合金室温断裂方式无明显影响。
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| 关 键 词： | 金属间化合物 TiAl合金 拉伸性能 应变速率 硼 |
EFFECTS OF TRACE BORON ADDITION AND STRAIN RATE ON ROOM TEMPERATURE MECHANICAL PROPERTIES OF WROUGHT TiAl ALLOY |
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| Wang Yu,Lin Dongliang. EFFECTS OF TRACE BORON ADDITION AND STRAIN RATE ON ROOM TEMPERATURE MECHANICAL PROPERTIES OF WROUGHT TiAl ALLOY[J]. The Chinese Journal of Nonferrous Metals, 1999, 9(1): 1-7 |
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| Authors: | Wang Yu Lin Dongliang |
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| Abstract: | Wrought Ti 47Al 2Mn 2Nb alloy was chosen to investigate the effects of trace (1.0%, mole fraction) boron addition and the strain rate on tensile properties of TiAl alloy at room temperature. It was found that the addition of boron effectively refines grains in the alloy, increases its strength and improves its ductility; on the other hand, the strengths of the two alloys, doped or undoped with boron, increase with the strain rate while tensile ductility is not so much sensitive to the strain rate as the strength; moreover, neither microalloying with boron nor a change in the strain rate from 10 -5 to 10 -1 s -1 produces an obvious change in fractography at room temperature. |
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| Keywords: | intermetallics titanium aluminide tensile properties strain rate boron |
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