| 粉末冶金Ti-47Al-2Cr-0.2Mo合金的流变行为及加工图(英文) |
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| 引用本文： | 李慧中,曾敏,梁霄鹏,李洲,刘咏.粉末冶金Ti-47Al-2Cr-0.2Mo合金的流变行为及加工图(英文)[J].中国有色金属学会会刊,2012,22(4):754-760. |
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| 作者姓名： | 李慧中 曾敏 梁霄鹏 李洲 刘咏 |
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| 作者单位： | 中南大学材料科学与工程学院;中南大学粉末冶金国家重点实验室;中南大学有色金属材料科学与工程教育部重点实验室 |
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| 基金项目： | Project (51174233) supported by the National Natural Science Foundation of China;Project (2011CB605500) supported by National Basic Research program of China |
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| 摘 要： | 采用Gleeble-1500热模拟试验机进行等温压缩实验,在变形温度为1000-1150°C、应变速率为0.001-1s-1的条件下,研究粉末冶金Ti-47Al-2Cr-0.2Mo合金的流变行为。结果表明:变形温度和应变速率对该合金的流变行为有显著影响,流变应力随应变速率的增加和变形温度的降低而增大。不同应变条件下的加工图表明该合金的加工图对应变量很敏感。应变量为0.5时,对应的加工图表明粉末冶金Ti-47Al-2Cr-0.2Mo合金合适的加工区域是:温度1000-1050°C、应变速率0.001-0.05s-1;温度1050-1125°C、应变速率0.01-0.1s-1。对热变形后合金的显微组织和加工图进行分析,发现1000°C,0.001s-1是该合金进行热变形的最佳工艺参数。
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| 关 键 词： | 粉末冶金 钛铝基合金 热压缩变形 加工图 |
| 收稿时间： | 9 September 2011 |
Flow behavior and processing map of PM Ti-47Al-2Cr-0.2Mo alloy |
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| LI Hui-zhong,ZENG Min,LIANG Xiao-peng,LI Zhou,LIU Yong.Flow behavior and processing map of PM Ti-47Al-2Cr-0.2Mo alloy[J].Transactions of Nonferrous Metals Society of China,2012,22(4):754-760. |
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| Authors: | LI Hui-zhong ZENG Min LIANG Xiao-peng LI Zhou LIU Yong |
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| Affiliation: | 1.School of Materials Science and Engineering,Central South University,Changsha 410083,China;2.State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;3.Key Laboratory of Nonferrous Metal Materials Science and Engineering of Ministry of Education,Changsha 410083,China |
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| Abstract: | The flow stress features of PM Ti-47Al-2Cr-0.2Mo alloy were studied by isothermal compression in the temperature range from 1000 to 1150 °C with strain rates of 0.001-1 s-1 on Gleeble-1500 thermo-simulation machine.The results show that the deformation temperature and strain rate have obvious effects on the flow characteristic,and the flow stress increases with increasing strain rate and decreasing temperature.The processing maps under different deformation conditions were established.The processing maps of this alloy are sensitive to strains.The processing map at the strain of 0.5 exhibits two suitable deformation domains of 1000-1050 °C at 0.001-0.05 s-1 and 1050-1125 °C at 0.01-0.1 s-1.The optimum parameters for hot working of the alloy are deformation temperature of 1000 °C and strain rate of 0.001 s-1 according to the processing map and microstructure at true strain of 0.5. |
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| Keywords: | powder metallurgy TiAl based alloy hot compression deformation processing map |
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