| 不同温度下GH690合金断裂韧性及断裂行为 |
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| 引用本文： | 王富强,王磊,刘杨,封辉,王朋.不同温度下GH690合金断裂韧性及断裂行为[J].材料研究学报,2010,24(3). |
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| 作者姓名： | 王富强 王磊 刘杨 封辉 王朋 |
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| 作者单位： | 东北大学材料各向异性与织构教育部重点实验室,沈阳,110819;东北大学材料各向异性与织构教育部重点实验室,沈阳,110819;东北大学材料各向异性与织构教育部重点实验室,沈阳,110819;东北大学材料各向异性与织构教育部重点实验室,沈阳,110819;东北大学材料各向异性与织构教育部重点实验室,沈阳,110819 |
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| 基金项目： | 国家重点基础研究发展计划2006CB605005; 长江学者创新团队发展计划IRT0713资助项目~~ |
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| 摘 要： | 选取三点弯曲试样、采用J积分方法评价了GH690合金从室温到623K的断裂韧性,考察了不同温度下合金的断裂行为。结果表明,GH690合金的断裂韧性随着温度的升高而降低。由于室温层错能较低,合金变形可以通过孪生协调进行,而形变孪晶诱导裂纹扩展转向,延长了裂纹的扩展路径,使合金表现为较高的断裂韧性;随着温度的升高,合金的层错能增加,形变孪晶生成的机率降低,裂纹扩展转向减少,导致合金的断裂韧性随之降低。
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| 关 键 词： | 金属材料 GH690合金 断裂韧性 形变孪晶 层错能 |
Fracture Toughness and Fracture Behavior of GH690 Alloy at Different Temperatures |
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| WANG Fuqiang WANG Lei LIU Yang FENG Hui WANG Peng.Fracture Toughness and Fracture Behavior of GH690 Alloy at Different Temperatures[J].Chinese Journal of Materials Research,2010,24(3). |
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| Authors: | WANG Fuqiang WANG Lei LIU Yang FENG Hui WANG Peng |
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| Affiliation: | WANG Fuqiang WANG Lei~(**) LIU Yang FENG Hui WANG Peng (Key Laboratory for Anisotropy , Texture of Materials,Ministry of Education,Northeastern University,Shenyang 110819) |
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| Abstract: | The fracture toughness and fracture behavior of GH690 alloy were investigated by means of three-point bending tests and the J-integral method in the range of the room temperature to 623 K.The results show that the fracture toughness of the alloy decreases with the increasing of testing temperature. The stacking fault energy of GH690 alloy is low at room temperature and the alloy was deformed by twinning.Deformation twins perpendicular to the main crack could lead to the deflexion of the crack, which is bene... |
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| Keywords: | metallic materials GH690 alloy fracture toughness deformation twin stacking fault energy |
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