Surface Structure in Corundum: II, Dislocation Structure and Fracture of Deformed Single Crystals
作者： ROBERT SCHEUPLEIN , PETER GIBBS
DOI: 10.1111/J.1151-2916.1962.TB11190.X
关键词:
摘要: The dislocation structure in plastically deformed single crystals of corundum (α-A12O3) was studied by etching and optical techniques. A special method deformation used which encouraged the participation both basal (0001), (1120) prismatic (1210), (1010) slip systems concurrently. This resulted highly stressed fractured spontaneously once outside surface scratched. Incoherent like imperfections, accompanied distinctive arrays, were found embedded crystals. These “surfaces” appeared as discontinuities, on each side dislocations etched differently. possible origin observed failure making use reaction ± [1010] = 3=1/3[2110] 1/3[1120] is suggested. mechanism for strain hardening bending presented.
sci-hub.se 参考文章(22)
R.W. Cahn, MECHANICAL TWINNING IN MOLYBDENUM J. Inst. Metals. ,(1955)
A.H. Cottrell, THEORY OF BRITTLE FRACTURE IN STEEL AND SIMILAR METALS Trans. Met. Soc. AIME. ,(1958)
S. Amelinckx, W. Dekeyser, The Structure and Properties of Grain Boundaries Journal of Physics C: Solid State Physics. ,vol. 8, pp. 325- 499 ,(1959) , 10.1016/S0081-1947(08)60482-8
AN Stroh, The Formation of Cracks as a Result of Plastic Flow Proceedings of The Royal Society A: Mathematical, Physical and Engineering Sciences. ,vol. 223, pp. 404- 414 ,(1954) , 10.1098/RSPA.1954.0124
J. S. Koehler, The Production of Large Tensile Stresses by Dislocations Physical Review. ,vol. 85, pp. 480- 481 ,(1952) , 10.1103/PHYSREV.85.480
John J. Gilman, Propagation of Cleavage Cracks in Crystals Journal of Applied Physics. ,vol. 27, pp. 1262- 1269 ,(1956) , 10.1063/1.1722249
Bakerian Lecture. Dislocations, Plastic Flow and Creep Proceedings of The Royal Society A: Mathematical, Physical and Engineering Sciences. ,vol. 220, pp. 1- 14 ,(1953) , 10.1098/RSPA.1953.0167
D Hull, Twinning and fracture of single crystals of 3% silicon iron Acta Metallurgica. ,vol. 8, pp. 11- 18 ,(1960) , 10.1016/0001-6160(60)90133-4
John J. Gilman, Structure and polygonization of bent zinc monocrystals Acta Metallurgica. ,vol. 3, pp. 277- 288 ,(1955) , 10.1016/0001-6160(55)90065-1
M.L Kronberg, Plastic deformation of single crystals of sapphire: Basal slip and twinning Acta Metallurgica. ,vol. 5, pp. 507- 524 ,(1957) , 10.1016/0001-6160(57)90090-1