Fernandes, PJLJones, DRH2007-02-082007-06-072007-02-082007-06-071995-10Fernandes, PJL and Jones, DRH. 1995. Effects of loading variables on fatigue-crack growth in liquid-metal environments. International journal of fatigue, vol 17 (7), pp 501-5050142-1123http://hdl.handle.net/10204/1622http://hdl.handle.net/10204/1622Liquid-metal-induced embrittlement (LMIE) refers to the loss of ductility in normally ductile metals and alloys when stressed while in contact with a liquid metal. In this study, the fatigue crack growth behaviour of brass in molten gallium is examined using standard LEFM testing procedures. The effects of environment, load ratio, cyclic frequency and load waveform on the rate of crack growth are investigated. At Delta K > Delta K-th, crack growth rates are approximately an order of magnitude faster in liquid metal than in air. However, at low AK values (low fatigue crack growth rates) and/or where the crack tip is exposed to the liquid metal for long periods of time, crack tip blunting by dissolution of the solid metal into the liquid metal occurs. This markedly decreases the rate of crack growth and results in apparent Delta K-th values in liquid metal that are significantly higher than the unembrittled threshold values.494473 bytesapplication/pdfenCopyright: 1995 Butterworth-Heinemann LtdLiquid metal induced embrittlementFatigue crack growthLoad ratiosCyclic frequenciesLoad wave-formsCrack tip blunting dissolutionsBrassGalliumArticleFernandes, P., & Jones, D. (1995). Effects of loading variables on fatigue-crack growth in liquid-metal environments. http://hdl.handle.net/10204/1622Fernandes, PJL, and DRH Jones "Effects of loading variables on fatigue-crack growth in liquid-metal environments." (1995) http://hdl.handle.net/10204/1622Fernandes P, Jones D. Effects of loading variables on fatigue-crack growth in liquid-metal environments. 1995; http://hdl.handle.net/10204/1622.TY - Article AU - Fernandes, PJL AU - Jones, DRH AB - Liquid-metal-induced embrittlement (LMIE) refers to the loss of ductility in normally ductile metals and alloys when stressed while in contact with a liquid metal. In this study, the fatigue crack growth behaviour of brass in molten gallium is examined using standard LEFM testing procedures. The effects of environment, load ratio, cyclic frequency and load waveform on the rate of crack growth are investigated. At Delta K > Delta K-th, crack growth rates are approximately an order of magnitude faster in liquid metal than in air. However, at low AK values (low fatigue crack growth rates) and/or where the crack tip is exposed to the liquid metal for long periods of time, crack tip blunting by dissolution of the solid metal into the liquid metal occurs. This markedly decreases the rate of crack growth and results in apparent Delta K-th values in liquid metal that are significantly higher than the unembrittled threshold values. DA - 1995-10 DB - ResearchSpace DP - CSIR KW - Liquid metal induced embrittlement KW - Fatigue crack growth KW - Load ratios KW - Cyclic frequencies KW - Load wave-forms KW - Crack tip blunting dissolutions KW - Brass KW - Gallium LK - https://researchspace.csir.co.za PY - 1995 SM - 0142-1123 T1 - Effects of loading variables on fatigue-crack growth in liquid-metal environments TI - Effects of loading variables on fatigue-crack growth in liquid-metal environments UR - http://hdl.handle.net/10204/1622 ER -