| 循环次数对TC4钛合金组织和力学性能的影响 |
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| 引用本文： | 何军利,毛小南,张鹏省,李宁.循环次数对TC4钛合金组织和力学性能的影响[J].金属热处理,2012,37(5):41-45. |
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| 作者姓名： | 何军利 毛小南 张鹏省 李宁 |
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| 作者单位： | 1. 西安建筑科技大学冶金工程学院,陕西西安710055／西北有色金属研究院,陕西西安710016
2. 西北有色金属研究院,陕西西安,710016 |
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| 摘 要： | 通过显微组织观察、室温拉伸和SEM断口扫描,研究了循环次数对TC4合金组织和力学性能的影响。研究结果表明,随着循环次数的增加,TC4合金的强度略有降低,伸长率和断面收缩率明显升高,条状α组织长径比逐渐减小,并部分球化;拉伸断口断裂形式由未循环时的解理断裂→解理+韧窝断裂→韧窝断裂转变。
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| 关 键 词： | TC4合金 循环热处理 显微组织 力学性能 断口形貌 |
Effect of cycling times on microstructure and mechanical properties of TC4 alloy |
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| HE Junli,MAO Xiaonan,ZHANG Pengsheng,LI Ning.Effect of cycling times on microstructure and mechanical properties of TC4 alloy[J].Heat Treatment of Metals,2012,37(5):41-45. |
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| Authors: | HE Junli MAO Xiaonan ZHANG Pengsheng LI Ning |
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| Affiliation: | 1,2(1.School of Metallurgy Engineering,Xi’an University of Architecture and Technology,Xi’an Shaanxi 710055,China; 2.Northwest Institute for Nonferrous Metal Research,Xi’an Shaanxi 710016,China) |
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| Abstract: | Effect of cycling times on microstructure and mechanical properties of TC4 alloy was investigated by microstructure observation,room temperature tensile test and SEM fractography.The results show that with the increase of cycling times,the strength of the TC4 alloy reduces slightly and the elongation and reduction of area increase significantly,the length-diameter ratio of strip a-phase decreases gradually,and part of them are spheroidized.The fracture form of the tensile fractures evolves from cleavage fracture of non-thermal cycled to cleavage fracture + tough dimple fracture and to tough dimple fracture. |
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| Keywords: | Ti-6A1-4V alloy cyclic heat treatment microstructures mechanical properties fractography |
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