| 金属玻璃温度依赖的拉压屈服不对称研究 |
| 其他题名 | Temperature-dependent yield asymmetry between tension and compression in metallic glasses
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| 陈艳 ; 蒋敏强; 戴兰宏; Chen, Y; Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China
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| 发表期刊 | 物理学报=Acta Physica Sinica
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| 2012-02-05
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| 卷号 | 61期号:3页码:036201 |
| ISSN | 1000-3290
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| 摘要 | 考虑静水应力对自由体积演化的影响,研究了金属玻璃在不同温度下的拉压屈服行为.结果表明,在拉伸和压缩载荷下,屈服强度均满足（T/Tg）1/2的温度依赖关系;同时,在不同温度下,材料的压力敏感系数保持为常值0.1.随着温度的升高,压力对自由体积的影响逐渐降低,从而导致材料的拉压屈服不对称性逐渐趋于不显著.在高温下,显著的结构弛豫减缓了自由体积增长速率,从而抑制材料迅速屈服.这些结果将有助于更深入的认识金属玻璃屈服及其拉压不对称性的内在机理. |
| 其他摘要 | By taking the pressure effect into account in the free volume evolution, the yield asymmetry between tension and compression of metallic glasses (MGs) under different temperatures is investigated. The yield strength in MGs with a (T/T-g)(1/2) temperature dependence is obtained for both tension and compression. The pressure-sensitive factor is derived to be a constant similar to 0.1 within a broad range of temperatures. Furthermore, it is revealed that the declining effect of pressure on the free volume evolution causes a weaker tension-compression asymmetry with temperature increasing. The significant structural relaxation at high temperature slows down the free volume evolution and hinders the sharp yield. These results improve our understanding of the underlying mechanisms of the yielding and its asymmetry between tension and compression in MGs. |
| 关键词 | 金属玻璃
屈服
拉压不对称
自由体积
Metallic Glass
Yield
Asymmetry Between Tension And Compression
Free Volume
Free-volume
Inhomogeneous Deformation
Mechanical-behavior
Amorphous-alloys
Shear Bands
Fracture
Flow
Pressure
Model
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| 学科领域 | 新型材料的力学问题
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| DOI | 10.7498/aps.61.036201
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| URL | 查看原文
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| 收录类别 | SCI
; CSCD
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| 语种 | 中文
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| WOS记录号 | WOS:000301008900048
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| 关键词[WOS] | FREE-VOLUME
; INHOMOGENEOUS DEFORMATION
; PRESSURE SENSITIVITY
; MECHANICAL-BEHAVIOR
; AMORPHOUS-ALLOYS
; SHEAR BANDS
; FRACTURE
; FLOW
; MODEL
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| WOS研究方向 | Physics
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| WOS类目 | Physics, Multidisciplinary
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| 项目资助者 | 国家自然科学基金(批准号:10725211,11002144,11021262,11132011); 国家自然科学基金委员会-中国工程物理研究院联合基金(批准号:10976100); 国家重点基础研究发展计划(批准号:2009CB724401,2012CB937500)资助的课题
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| CSCD记录号 | CSCD:4545505
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| 课题组名称 | LNM冲击动力学与新型材料力学性能
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/46740
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| 专题 | 非线性力学国家重点实验室
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| 通讯作者 | Chen, Y; Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China |
推荐引用方式
GB/T 7714 |
陈艳,蒋敏强,戴兰宏,等. 金属玻璃温度依赖的拉压屈服不对称研究[J]. 物理学报=Acta Physica Sinica,2012,61,3,:036201.
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| APA |
陈艳,蒋敏强,戴兰宏,Chen, Y,&Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China.(2012).金属玻璃温度依赖的拉压屈服不对称研究.物理学报=Acta Physica Sinica,61(3),036201.
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| MLA |
陈艳,et al."金属玻璃温度依赖的拉压屈服不对称研究".物理学报=Acta Physica Sinica 61.3(2012):036201.
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