| 双重退火制度对TC21钛合金断裂韧性的影响 |
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| 引用本文： | 史春玲,王浩军,石晓辉,曾卫东. 双重退火制度对TC21钛合金断裂韧性的影响[J]. 钛工业进展, 2013, 30(1): 12-15 |
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| 作者姓名： | 史春玲 王浩军 石晓辉 曾卫东 |
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| 作者单位： | 1. 中航工业西安飞机工业(集团)有限责任公司,陕西西安,710089
2. 西北工业大学凝固技术国家重点实验室,陕西西安,710072 |
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| 摘 要： | 利用光学显微镜和扫描电镜等手段研究了双重退火工艺对TC21钛合金断裂韧性的影响。结果表明：不同退火制度下TC21钛合金试样断裂韧性均在100MPa·m1/2以上；第一次退火温度相同的条件下，随着第一次退火温度的升高，TC21钛合金断裂韧性都略有升高，而在第二次退火温度相同的条件下，第一次退火温度对TC21钛合金断裂韧性影响较小；经950℃×2h／AC＋590℃×411／AC双重热处理的TC21钛合金具有较崎岖的裂纹扩展路径和较好的塑性，故其断裂韧性最高，可达109．7MPa·m1/2。
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| 关 键 词： | TC21钛合令 断裂韧性 断口形貌 双重退火 |
The Effect of Duplex Annealing Heat Treatment on Fracture Toughness of TC21 Titanium Alloy |
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| Shi Chunling , Wang Haojun , Shi Xiaohui , Zeng Weidong. The Effect of Duplex Annealing Heat Treatment on Fracture Toughness of TC21 Titanium Alloy[J]. , 2013, 30(1): 12-15 |
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| Authors: | Shi Chunling Wang Haojun Shi Xiaohui Zeng Weidong |
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| Affiliation: | 1.AVIC Xi’an Aircraft Industry(Group) Co.,Ltd.,Xi’an 710089,China) (2.State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China) |
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| Abstract: | In this paper, the effect of duplex annealing process on fracture toughness of TC21 alloy has been re- searched by means of optical microscope and scanning electron microscope. The results show that the fracture tough- ness of specimens under these four duplex annealing processes are all above 100 MPa · m1/2. The fracture toughness of specimens under the second annealing temperature of 590 ℃ are slightly higher than that of specimens under second annealing temperature of 500 ℃ at a given first annealing temperature, but the fracture toughness of specimens at a given second annealing temperature don＇ t change obviously under different first annealing temperatures. The speci- mens under duplex annealing process 950 ℃ × 2 h / AC ＋ 590 ℃ × 4 h/AC can get highest average fracture toughness which can reach 109.7 MPa · m1/2 due to more complicated crack propagation path and better plasticity of specimens under this process. |
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| Keywords: | TC21 titanium alloy fracture toughness fractography duplex annealing |
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