| In situ observations on shear and creep-fatigue fracture behaviors of SnBi/Cu solder joints |
| Q. K. Zhang; Z. F. Zhang
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| 2011
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| 发表期刊 | Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
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| ISSN | 0921-5093
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| 卷号 | 528期号:6页码:2686-2693 |
| 摘要 | Shear and creep-fatigue fracture behaviors of the SnBi/Cu solder joints were investigated in this study. The deformation and fracture morphologies were in situ observed by scanning electron microscope, and the fracture mechanisms were discussed based on the observation results. It is found that the SnBi solder in the solder joint shows good ductility under shear stress, there is serious deformation mismatch between the Sn and Bi phases in micro-scale but no macro-scale cracking occurs inside the solder, and the shear fracture occurs along the Cu/solder interface. Under creep-fatigue loadings, the strain of the solder joints increases rapidly during the initial few cycles, but the increase rate decreases due to strain hardening. After the strain hardening becomes saturated, the strain increases exponentially with increasing cycles and the damage inside the solder keeps developing, final fracture occurs inside the solder near the joint interface. As the plastic deformation of the SnBi solder concentrates at the grain boundary, it is predicated that grain-boundary sliding is the major creep deformation mechanism. The influencing factors on creep-fatigue resistance include the stress range, holding time and grain size of the solder. Based on the understandings, techniques to enhance the creep-fatigue resistance were proposed. (C) 2011 Elsevier B.V. All rights reserved. |
| 部门归属 | [zhang, q. k.; zhang, z. f.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.;zhang, zf (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china;zhfzhang@imr.ac.cn
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| 关键词 | In Situ Observation
Shear
Creep-fatigue
Fracture
Sn-58bi Solder
Grain-boundary Sliding
Lead-free Solders
Sn-bi
Microstructure Evolution
Tensile Properties
Alloys
Deformation
Technology
Metals
Ag
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| URL | 查看原文
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| WOS记录号 | WOS:000287643200063
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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://ir.imr.ac.cn/handle/321006/30904
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| 专题 | 中国科学院金属研究所
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推荐引用方式
GB/T 7714 |
Q. K. Zhang,Z. F. Zhang. In situ observations on shear and creep-fatigue fracture behaviors of SnBi/Cu solder joints[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2011,528(6):2686-2693.
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| APA |
Q. K. Zhang,&Z. F. Zhang.(2011).In situ observations on shear and creep-fatigue fracture behaviors of SnBi/Cu solder joints.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,528(6),2686-2693.
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| MLA |
Q. K. Zhang,et al."In situ observations on shear and creep-fatigue fracture behaviors of SnBi/Cu solder joints".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 528.6(2011):2686-2693.
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