| Deformation behavior and mechanisms of Ti- 1023 alloy |
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| 作者姓名： | 鲍如强 黄旭 曹春晓 |
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| 作者单位： | Beijing Institute of Aeronautical Materials Beijing 100095 China，Beijing Institute of Aeronautical Materials Beijing 100095 China，Beijing Institute of Aeronautical Materials Beijing 100095 China |
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| 摘 要： | 1 Introduction Beta titanium alloys offer a variety of microstructural morphologies and associated mechanical property variations thus giving considerable latitude in microstructure design. They are the most versatile class of titanium alloys and offer th…
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| 关 键 词： | 钛合金 变形行为 变形机制 疲劳 应变 |
| 收稿时间： | 2005-06-15 |
| 修稿时间： | 2005-11-15 |
Deformation behavior and mechanisms of Ti- 1023 alloy |
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| BAO Ru-qiang,HUANG Xu,CAO Chun-xiao.Deformation behavior and mechanisms of Ti- 1023 alloy[J].Transactions of Nonferrous Metals Society of China,2006,16(2):274-280. |
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| Authors: | BAO Ru-qiang HUANG Xu CAO Chun-xiao |
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| Affiliation: | 1. School of Materials Science and Engineering, Beihang University, 100191 Beijing, China;2. Institute of Titanium Alloy, Beijing Institute of Aeronautical Materials, 100095 Beijing, China;1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, 710072, PR China;2. Laboratoire d’Étude des MicrCostructures et de Mécanique des Matériaux (LEM3), CNRS 7239, Université de Lorraine, 57045, Metz, France;3. Laboratory of Excellence on Design of Alloy Metals for Low-mAss Structures (DAMAS), Université de Lorraine, 57045, Metz, France;1. School of Materials Science and Engineering, Beihang University, 37 Xueyuan Road, Haidian District, Beijing 100191, China;2. School of Planning, Architecture and Civil Engineering, Queen''s University Belfast, Belfast BT7 1NN, UK;3. Beijing Institute of Aeronautical Materials, Beijing 100095, China |
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| Abstract: | The deformation behavior and mechanisms of Ti-1023 alloy were studied in the temperature range of 650–900 °C and strain rate range of 0.001–10 s?1 by compression and tensile tests. The results show that in a limited strain rate range of 0.001–0.1 s?1, the kinetic rate equation is obeyed and a linear fit is obtained at all the temperatures. The apparent activation energy is 322 kJ/mol in the α-β region and 160 kJ/mol in the β region, respectively. Power dissipation maps of this alloy developed by using Gleeble test data show three domains in the tested range. Superplasticity, marked by abnormal elongation at 700 °C, occurs in the temperature range of 650–750 °C and at strain rates below about 0.03 s?1. Large grain superplasticity takes place in the temperature range of 750–850 °C and strain rates range of 0.001–0.03 s?1. Dynamic recrystallization occurs in the temperature range of 850–900 °C and at strain rates below about 1 s?1. The instability maps of this alloy were also developed. |
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| Keywords: | Ti-1023 alloy deformation behavior deformation mechanisms processing maps superplasticity |
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