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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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双界面约束下纯铝层韧脆转变行为的实验研究
, PP. 920-925
Keywords: 纯铝层,爆炸焊,约束
Abstract:
利用爆炸焊及电子束焊接方法制备了含不同厚度中间纯铝层的LY12/Al/LY12四点弯曲试样,并在纯铝层中预制了平行于界面的疲劳裂纹.加载后裂纹尖端侧剖形貌的金相观察和对应断口表面的微区成分的能谱分析均确认了裂纹在纯铝层内的扩展.实验结果表明在双界面强约束下,随着中间纯铝层厚度的减小,所测定的预裂纹试样的载荷/位移曲线表现出明显的差异;以其临界J积分表征的断裂韧性值显著降低,即纯铝层发生了韧脆转变;试样断口表面出现局部准解理花样等脆化特征,其所占比例逐渐增加;对这种约束下纯铝韧脆转变的微观机理进行了初步的探讨.
| [1] | Ha K F. Basics of Fracture Physics. Beijing: Science Press. 2000: 53(哈宽富.断裂物理基础.北京:科学出版社,2000:53)
|
| [2] | Chu W Y, Qiao L J, Chen Q Z, Gao K W. Fracture and Environmental Fracture. Beijing: Science Press, 2000: 31(褚武扬,乔利杰,陈奇志,高克玮.断裂与环境断裂.北京:科学出版社,2000:31)
|
| [3] | Varias A G, Suo Z, Shin C F. J Mech Phys Solids, 1991;39: 963
|
| [4] | Evans G, Dalgleish B J. Acta Metall Mater, 1992; 40: S295
|
| [5] | Hsia K J, Suo Z, Yang W. J Mech Phys Solids, 1994; 42: 877
|
| [6] | Zhang L D, Mou J M. Nanomaterials and Nanostructure. Beijing: Science Press, 2001: 11 (张立德,牟季美.纳米材料和纳米结构.北京:科学出版社2001:11)
|
| [7] | Zhang L. Phys Rev Lett, 2000; 85: 1484
|
| [8] | Sun J. Chin J Mater Res, 1996; 10: 698(孙军.材料研究学报, 1996;10:698)
|
| [9] | Sun J, Boyd J D. Int J Press Vessels Piping, 2000; 77: 369
|
| [10] | Bloyer D R, Ritchie R O. Metall Mater Trans, 2000; 30A:633
|
| [11] | Mohamed E S, Fumiyoshi M, Masao J, Katsuya K. EngFract Mech, 1999; 63: 447
|
| [12] | Kim Y J. Eng Fract Mech, 2002; 69: 793
|
| [13] | Cook R F, Suo Z. MRS Bull, 2002; (1) : 45
|
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