The influence of porosity on the fatigue crack growth behavior of Ti–6Al–4V laser welds
作者： L. W. Tsay , Y.-P. Shan , Y.-H. Chao , W. Y. Shu
DOI: 10.1007/S10853-006-0833-X
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摘要: The effect of porosity––a common welding defect––on the fatigue crack growth rate (FCGR) in Ti–6Al–4V laser welds was investigated. experimental results reveal that porosity present partial penetration over a narrow fusion zone (FZ) with martensite structure. FCGR FZ lower than base plate. fracture surface morphology weld metal much rougher as compared to Randomly oriented led local cleavage along preferred plane, thus, altering direction significantly out primary plane. zigzag path resulted reduced at given ΔK Besides, porous showed serration on curve, and behaved similar characteristics defect free one. SEM fractography revealed deflection around together notch blunting tip pierced into porosity, balanced increased for occurrence instant advance front reached low stress ratio. In contrast, drop occurred sparingly high ratio met porosity.
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R.K. Shiue, C.T. Chang, M.C. Young, L.W. Tsay, The effect of residual thermal stresses on the fatigue crack growth of laser-surface-annealed AISI 304 stainless steel: Part I: computer simulation Materials Science and Engineering A-structural Materials Properties Microstructure and Processing. ,vol. 364, pp. 101- 108 ,(2004) , 10.1016/J.MSEA.2003.07.003
Y.W. Shi, B.Y. Chen, J.X. Zhang, Effects of welding residual stresses on fatigue crack growth behaviour in butt welds of a pipeline steel Engineering Fracture Mechanics. ,vol. 36, pp. 893- 902 ,(1990) , 10.1016/0013-7944(90)90266-J
T. Ogawa, T. Ochi, K. Tokaji, FATIGUE CRACK GROWTH BEHAVIOUR AND FRACTURE RESISTANCE IN CERAMICS Fatigue & Fracture of Engineering Materials and Structures. ,vol. 16, pp. 837- 849 ,(1993) , 10.1111/J.1460-2695.1993.TB00123.X
L Tsay, The effect of microstructures on the fatigue crack growth in Ti_6Al_4V laser welds International Journal of Fatigue. ,vol. 19, pp. 713- 720 ,(1997) , 10.1016/S0142-1123(97)00113-8
P. E. Irving, C. J. Beevers, The effect of air and vacuum environments on fatigue crack growth rates in Ti-6Al-4V Metallurgical Transactions. ,vol. 5, pp. 391- 398 ,(1974) , 10.1007/BF02644106
G. R. Yoder, L. A. Cooley, T. W. Crooker, Fatigue Crack Propagation Resistance of Beta-Annealed Ti-6Al-4V Alloys of Differing Interstitial Oxygen Contents Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science. ,vol. 9, pp. 1413- 1420 ,(1978) , 10.1007/BF02661812
M.R. Bache, W.J. Evans, The fatigue crack propagation resistance of Ti–6Al–4V under aqueous saline environments International Journal of Fatigue. ,vol. 23, pp. 319- 323 ,(2001) , 10.1016/S0142-1123(01)00141-4
L.W. Tsay, M.C. Young, F.Y. Chou, R.K. Shiue, The effect of residual thermal stresses on the fatigue crack growth of laser-annealed 304 stainless steels Materials Chemistry and Physics. ,vol. 88, pp. 348- 352 ,(2004) , 10.1016/J.MATCHEMPHYS.2004.07.020
K.S. Ravichandran, E.S. Dwarakadasa, D. Banerjee, Mechanisms of cleavage during fatigue crack growth in Ti6Al4V alloy Scripta Metallurgica et Materialia. ,vol. 25, pp. 2115- 2120 ,(1991) , 10.1016/0956-716X(91)90284-8
SHENG-HUI WANG, SHENG-HUI WANG, Fatigue crack closure and crack growth behaviour in a titanium alloy with different microstructures Journal of Materials Science. ,vol. 33, pp. 4509- 4516 ,(1998) , 10.1023/A:1004491932456