STUDY OF ADIABATIC SHEAR BANDS IN FATIGUED COPPER SINGLE CRYATALS WITH DIFFERENT ORIENTATIONS UNDER HIGH VELOCITY IMPACT
中国科学院金属研究所
Cite this article:
. STUDY OF ADIABATIC SHEAR BANDS IN FATIGUED COPPER SINGLE CRYATALS WITH DIFFERENT ORIENTATIONS UNDER HIGH VELOCITY IMPACT. Acta Metall Sin, 2006, 42(3): 245-250 .
Abstract Adiabatic shear bands (ASBs) were studied by SEM electron channeling contrast (ECC) technique in fatigued copper single crystals with different orientations under high velocity impact using split-Hopkinson pressure bar (SHPB). The experimental results show that the critical strain of ASBs’ formation is orientation-dependent. Single crystal close to the compression critical double slip orientation needs less strain for ASB formation than the one with typically single slip and the one close to compression conjugate double slip orientations do. Single crystal close to the coplanar double slip orientation needs the maximum critical strain. Under current experimental circumstance the typical dislocation pattern within ASBs is dislocation cell structure, and no recrystallization was observed. There are three types of ASBs according to their orientations. The first type is that the plane of ASB is very close to the habit plane of the second type deformation band (DBII) in fatigued copper single crystals, which needs the minimum critical strain to form. The second type is rather close to the habit plane of either DBI (the first type deformation band) or DBII, which needs modest critical strain。The third type is neither close to the habit plane of DBI nor DBII, which needs the maximum critical stain.
[1] Meyers M A, Wittman C L. Metall Trans, 1990; 21A: 707 [2] Lee C G, Park W J, Lee S, Shin K S. Metall Mater Trans, 1998; 29A: 477 [3] Dobromyslov A V, Taluts N I, Kazantseva N V. Scr Mater, 1999; 42: 61 [4] Dai L H, Liu L F, Bai Y L. Int J Solid Struct, 2004; 41: 5979 [5] Duan Z Q, Li S X, Huang D W. Fatigue Fract Eng Mater Struct, 2003; 26: 1119 [6] Duan Z Q, Cheng G Q, Li S X, Huang D W. Ada Metall Sin, 2003; 39: 486 (段占强,程国强,李守新,黄德武．金属学报,2003;39:486) [7] Edington J W. Philos Mag, 1969; 19: 1189 [8] Rashid M M, Gray G T, Nemat-Nasser S. Philos Mag, 1992; 65A: 707 [9] Cheng G Q, Li S X. Mater Sci Technol, 2005; 21: 813 [10] Li J W, Li M Y, Guo X L, Li S X. Ada Metall Sin, 2005; 41: 161 (李军伟,李明扬,郭小龙,李守新．金属学报,2005;41:161) [11] Li X W, Umakoshi Y, Gong B, Li S X, Wang Z G. Mater Sci Eng, 2002; A333: 51 [12] Reid C N. Deformation Geometry for Materials Scientists. New York: Pergamon Press, 1973 [13] Meyers M A, Nesterenko V F, La Salvia J C, Xue Q. Mater Sci Eng, 2001; A317: 204 [14] Li S X, Li X W, Zhang Z F, Wang Z G, Lu K. Philos Mag, 2002; 82: 3129 [15] Asaro R J. Ada Metall, 1979; 27: 445 [16] Peirce D, Asaro R J, Needleman A. Ada Metall, 1982; 30: 1087t
LI Xiaowu; WANG Zhongguang;LI Shouxin (State Key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; The Chinese Academyof Sciences; Shenyang 110015)Correspondent: LI Xiaowu; Tel: (024)23843531-55925; Fax: (024)23891320;E-mail: rwli imr.ac. cn. CYCLIC STRAIN HARDENING AND SATURATION OF [■12]DOUBLE-SLIP-ORIENTED COPPER SINGLE CRYSTALS[J]. 金属学报, 1998, 34(8): 864-869.
LI Xiaowu; WANG Zhongguang; SUN Shouguang; WU Shiding;LI Shouxin;LI Guangyi (State Key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110015)(Department of Mechanical Engineering; Northern Jiaotong University; Beijing 100044). CYCLIC DEFORMATION BEHAVIOR OF [011] MULTIPLE-SLIP-ORIENTED COPPER SINGLE CRYSTALSCyclic Stress-Strain Response[J]. 金属学报, 1998, 34(5): 545-551.
