Effect of Water Vapor Pressure on Fatigue Crack Growth in Al-Zn-Cu-Mg Alloy Over Wide-Range Stress Intensity Factor Loading
作者： J.T. Burns , R.W. Bush , J.H. Ai , J.L. Jones , Y. Lee
DOI: 10.1016/J.ENGFRACMECH.2014.11.009
关键词: Water vapor 、 Materials science 、 Vapor pressure 、 Stress concentration 、 Intensity (heat transfer) 、 Structural engineering 、 Composite material 、 Vapour pressure of water 、 Crack closure 、 Paris' law 、 Stress intensity factor
摘要: Abstract Investigation of the deleterious effect high purity water vapor on fatigue crack growth rate (da/dN) in 7075-T651 shows that declines with decreasing pressure (PH2O) over a wide range stress intensity (ΔK). Decreasing ΔK experiments exhibit novel minimum da/dN for intermediate PH2O and low ΔK. This testing protocol dependent environmental-fatigue behavior are explained by wake fracture morphology R-dependent opening displacement effects molecular flow to tip. environmentally-based mechanism leads onset reversal non-conservative false threshold range.
sci-hub.se 参考文章(78)
S.P. Lynch, Metallographic and fractographic techniques for characterising and understanding hydrogen-assisted cracking of metals Gaseous Hydrogen Embrittlement of Materials in Energy Technologies#R##N#The Problem, its Characterisation and Effects on Particular Alloy Classes. pp. 274- 346 ,(2012) , 10.1533/9780857093899.2.274
D. C. Slavik, C. P. Blankenship, E. A. Starke, R. P. Gangloff, Intrinsic fatigue crack growth Metallurgical Transactions A. ,vol. 24, pp. 1807- 1817 ,(1993) , 10.1007/BF02657855
Richard P. Gangloff, Hydrogen Assisted Cracking of High Strength Alloys ,(2003)
Robert Peh-ying Wei, Fracture Mechanics : Integration of Mechanics, Materials Science and Chemistry ,(2010)
Satish Kandlikar, Srinivas Garimella, Dongqing Li, Stephane Colin, Michael R King, Heat Transfer and Fluid Flow in Minichannels and Microchannels ,(2005)
R. P. Wei, P. S. Pao, R. G. Hart, T. W. Weir, G. W. Simmons, Fracture mechanics and surface chemistry studies of fatigue crack growth in an aluminum alloy Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science. ,vol. 11, pp. 151- 158 ,(1980) , 10.1007/BF02700451
DL. Dicus, Effect of Water Vapor on Fatigue Crack Growth in 7475-T651 Aluminum Alloy Plate ASTM International. ,(1984) , 10.1520/STP34452S
E. L. Cussler, Diffusion: Mass Transfer in Fluid Systems ,(1984)
R.O. Ritchie, Mechanisms of fatigue-crack propagation in ductile and brittle solids International Journal of Fracture. ,vol. 100, pp. 55- 83 ,(1999) , 10.1023/A:1018655917051
R. D. Carter, E. W. Lee, E. A. Starke, C. J. Beevers, The effect of microstructure and environment on fatigue crack closure of 7475 aluminum alloy Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science. ,vol. 15, pp. 555- 563 ,(1984) , 10.1007/BF02644980