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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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5456铝合金PLC效应的两种临界机制研究
DOI: 10.3724/SP.J.1037.2012.00270, PP. 1453-1458
Keywords: 5456铝合金,Portevin-Le,Chatelier,(PLC),效应,动态应变时效,位错,拉伸实验
Abstract:
在不同温度下对5456铝合金进行拉伸实验,观察到低温下的正常临界行为和高温下的反常临界行为.对比不同温度下的应力--应变曲线,分别定义上下包络线.临界应变之前的应力在低温时遵循下包络线,在高温时遵循上包络线.锯齿状应力-应变曲线在上下包络线之间振荡,且在低温时,锯齿方向朝上;高温时锯齿方向朝下.通过对应力和微观位错运动的分析讨论,提出了分别对应于上下包络线的2种稳定塑性变形,并给出相应的位错运动情况下包络线对应着位错没有被溶质原子钉扎,上包络线对应着一部分位错已经被溶质原子钉扎但未能脱钉.正常临界行为取决于第一次钉扎,而反常临界行为取决于第一次脱钉.
| [1] | Cieslar M, Fressengeas C, Karimi A, Martin J L. Scr Mater, 2003; 48: 1105
|
| [2] | Cottrell A H. Philos Mag, 1953; 44: 829
|
| [3] | Nagarjuna S, Anozie F N, Evans J T. Mater Sci Technol, 2003; 19: 1661
|
| [4] | Lu J Y, Jiang Z Y, Zhang Q C. Acta Metall Sin, 2006; 42:139(卢俊勇, 蒋震宇, 张青川. 金属学报, 2006; 42: 139)
|
| [5] | Liu H W, Zhang Q C, Lu J Y, Xiang G F, Wu X P. Acta Metall Sin, 2006; 42: 925(刘颢文, 张青川, 卢俊勇, 项国富, 伍小平. 金属学报, 2006; 42: 925)
|
| [6] | Sleeswyk A W. Acta Metall, 1958; 6: 598
|
| [7] | Mulford R A, Kocks U F. Acta Metall, 1979; 27: 1125
|
| [8] | McCormick P G. Acta Metall, 1988; 36: 3061
|
| [9] | Springer F, Nortmann A, Schwink C. Phys Status Solidi, 1998; 170A: 63
|
| [10] | Klose F B, Ziegenbein A, Weidenm¨uller J, Neuh¨auser H, Hahner P. Comput Mater Sci, 2003; 26: 80
|
| [11] | Balik J, Lukac P, Kubin L P. Scr Mater, 2000; 42: 465
|
| [12] | Chihab K, Fressengeas C. Mater Sci Eng, 2003; A356: 102
|
| [13] | Peng K P, Chen W Z, Qian K W. Mater Sci Eng, 2006;A419: 53
|
| [14] | Cui C Y, Gu Y F, Yuan Y, Harada H. Scr Mater, 2011;64: 502
|
| [15] | Kubin L P, Estrin Y. Acta Metall Mater, 1990; 38: 697
|
| [16] | McCormick P G. Acta Metall, 1972; 20: 351
|
| [17] | Brechet Y, Estrin Y. Acta Metall Mater, 1995; 43: 955
|
| [18] | Cai M C, Niu L S, Yu T, Shi H J, Ma X F. Mater Sci Eng,2010; A527: 5175
|
| [19] | Rodriguez P, Venkadesan S. Solid State Phenom, 1995;42-43: 257
|
| [20] | Soare M A, Curtin W A. Acta Mater, 2008; 56: 4091
|
| [21] | Flor H, Neuh¨auser H. Acta Metall, 1980; 28: 939
|
| [22] | Rizzi E, H¨ahner P. Int J Plasticity, 2004; 20: 121
|
| [23] | Hu Q, Zhang Q C, Cao P T, Fu S H. Acta Mater, 2012; 60: 1647
|
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