| Ni-Ti-Nb宽滞后形状记忆合金焊接环拉伸断裂分析 |
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| 引用本文： | 胡姜文,杨思乾,马铁军,张勇. Ni-Ti-Nb宽滞后形状记忆合金焊接环拉伸断裂分析[J]. 理化检验(物理分册), 2008, 44(1): 11-13 |
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| 作者姓名： | 胡姜文 杨思乾 马铁军 张勇 |
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| 作者单位： | 西北工业大学,材料学院,西安,710072;西北工业大学,材料学院,西安,710072;西北工业大学,材料学院,西安,710072;西北工业大学,材料学院,西安,710072 |
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| 摘 要： | 研究了Ni—Ti—Nb宽滞后形状记忆合金点焊环拉伸试验的断裂行为。对形状记忆合金环的断口形貌及微区成分用扫描电镜作了分析，得出了形状记忆合金环中的（Ti，Nb）2Ni硬脆相是导致断裂的主要原因。并分析了（Ti，Nb）2Ni硬脆相形成的原因，提出了利用多次电弧炉熔炼和热变形工艺的方法来提高记忆合金冶金质量的建议。
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| 关 键 词： | 形状记忆合金 断裂 热变形 宽滞后 |
| 文章编号： | 1001-4012（2008）01-0011-03 |
| 收稿时间： | 2007-01-15 |
| 修稿时间： | 2007-01-15 |
TENSILE FRACTURE ANALYSIS OF Ni-Ti-Nb MEMORY ALLOY JOINTING RING WITH WIDE HYSTERESIS SHAPE |
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| HU Jiang-wen,YANG Si-qian,MA Tie-jun,ZHANG Yong. TENSILE FRACTURE ANALYSIS OF Ni-Ti-Nb MEMORY ALLOY JOINTING RING WITH WIDE HYSTERESIS SHAPE[J]. Physical Testing and Chemical Analysis Part A:Physical Testing, 2008, 44(1): 11-13 |
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| Authors: | HU Jiang-wen YANG Si-qian MA Tie-jun ZHANG Yong |
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| Affiliation: | (College of Material Science of Northwestern Polytechnical University, Xi＇an 710072, China) |
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| Abstract: | The fracture of Ni-Ti-Nb alloy ring with wide hystersis shape memory, is studied oy tensue test. The fracture and microstructure of ring is analysed by SEM. It is found that the hard and brittle （Ti, Nb）2Ni phase leads to fracture of the ring. The （Ti, Nb）2Ni phase formation cause is analysed. It is proposed that these methods of multiple electric arc melting and thermal deformation are used to improve the quality of the alloy. |
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| Keywords: | Shape memory alloy Fracture Thermal deformation Wide hysteresis |
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