TB17钛合金等温时效析出行为
采用X射线衍射（XRD）、透射电子显微镜（TEM）、光学显微镜（OM）等对新型超高强韧TB17钛合金次生α相转变动力学进行研究。实验结果表明,该合金经β相区固溶,520℃不同保温时间时效后,片层次生α相在β相基体上析出、形核、长大,并且与基体具有柏氏共格关系。短时时效后次生α相呈针状,随着保温时间延长,次生α相粗化呈短棒状。析出相含量对TB17钛合金强化具有重要影响,TB17钛合金在完全析出过程中,次生α相含量增加,时效硬化作用增加。TB17钛合金次生α相等温相变动力学采用JMAK方程进行描述。...
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| Published in | 航空材料学报 Vol. 36; no. 5; pp. 1 - 6 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
北京航空材料研究院 先进钛合金航空科技重点实验室,北京,100095
2016
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1005-5053 |
| DOI | 10.11868/j.issn.1005-5053.2016.5.001 |
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| Summary: | 采用X射线衍射（XRD）、透射电子显微镜（TEM）、光学显微镜（OM）等对新型超高强韧TB17钛合金次生α相转变动力学进行研究。实验结果表明,该合金经β相区固溶,520℃不同保温时间时效后,片层次生α相在β相基体上析出、形核、长大,并且与基体具有柏氏共格关系。短时时效后次生α相呈针状,随着保温时间延长,次生α相粗化呈短棒状。析出相含量对TB17钛合金强化具有重要影响,TB17钛合金在完全析出过程中,次生α相含量增加,时效硬化作用增加。TB17钛合金次生α相等温相变动力学采用JMAK方程进行描述。 |
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| Bibliography: | Transmission Electron Microscope （TEM） , X-Ray Diffraction（ XRD） and Optical Microscope（ OM） were employed to investigate the aging precipitation behavior of a new type of ultra-high strength TB17 titanium alloy. The results show that during heat solution treated in the β phase field followed by aging the secondary a phase is nucleated, precipitated and grew on the β phase matrix, and the precipitated phase is lamellar structure which has burgers relation with the matrix. The secondary a phase content is increased rapidly and finally reach a steady-state as aging time increased and the final product of aging consists of a phase and β phase, there is a good linearity relationship between the content of secondary a phase and the hardness of age hardening. The TB17 titanium alloy iso-thermal phase transformation kinetics can be described by JMAK equation. TB17 titanium alloy; isothermal aging; secondary α phase; precipitation 11-3159/V WANG Zhe, WANG Xinnan, ZHU Liwei, ZHU Zhishou（Aviation Key Laboratory of Science |
| ISSN: | 1005-5053 |
| DOI: | 10.11868/j.issn.1005-5053.2016.5.001 |