| 金属玻璃的断裂机理与其断裂韧度的关系 |
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| 引用本文： | 吴飞飞,余鹏,卞西磊,谭军,王建国,王刚. 金属玻璃的断裂机理与其断裂韧度的关系[J]. 物理学报, 2014, 63(5): 58101-058101. DOI: 10.7498/aps.63.058101 |
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| 作者姓名： | 吴飞飞 余鹏 卞西磊 谭军 王建国 王刚 |
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| 作者单位： | 1. 光电工程材料重庆市重点实验室, 重庆师范大学物理与电子工程学院, 重庆 401331;2. 上海大学微结构重点实验室, 上海 200444 |
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| 基金项目： | 国家自然科学基金(批准号:51271210,51101178);重庆市基础与前沿研究计划杰青项目(批准号:cstc2013jcyjjq50002);重庆市教委自然科学基金(批准号:KJ120610)资助的课题~~ |
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| 摘 要： | 本文选取了三种不同断裂韧度值的金属玻璃Zr41.25Ti13.75Ni10Cu12.5Be22.5,Ce68Al10Cu20Co2和Fe41Co7Cr15Mo14Y2C15B6,通过压缩实验测量了它们的应力-应变关系;样品断裂以后观察了其断口形貌,发现这三种金属玻璃具有不同的断裂模式.经过对这三种金属玻璃做缺口三点弯曲实验,利用数字散斑技术研究了缺口前端应变集中方向弹性应变场的演化过程.根据金属玻璃的屈服准则,阐述了不同断裂韧度值的金属玻璃的断裂机理.
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| 关 键 词： | 金属玻璃 断裂韧度 断裂机理 |
| 收稿时间： | 2013-09-07 |
Correlation between fracture mechanism and fracture toughness in metallic glasses |
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| Wu Fei-Fei,Yu Peng,Bian Xi-Lei,Tan Jun,Wang Jian-Guo,Wang Gang. Correlation between fracture mechanism and fracture toughness in metallic glasses[J]. Acta Physica Sinica, 2014, 63(5): 58101-058101. DOI: 10.7498/aps.63.058101 |
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| Authors: | Wu Fei-Fei Yu Peng Bian Xi-Lei Tan Jun Wang Jian-Guo Wang Gang |
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| Abstract: | Three metallic glasses Zr41.25Ti13.75Ni10Cu12.5Be22.5, Ce68Al10Cu20Co2 and Fe41Co7Cr15Mo14Y2C15B6(all in at.%), were compressed experimentally, and the fractured samples were investigated by scanning electron microscope. It was found that they exhibit different fracture modes. In three-point bending tests of the three pre-notched metallic glass samples, a digital speckle technique is adopted to in-situ observe the elastic strain field evolution in front of the crack tip. Accroding to the yield criterion of metallic glasses, the mechanism of different fracture processes in metallic glasses with various fracture toughnesses are elucidated.
Keywords：metallic glassfracture toughnessfracture mechanism |
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| Keywords: | metallic glass fracture toughness fracture mechanism |
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