Acta Metall Sin  1996, Vol. 32 Issue (3): 254-260    DOI:

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RELATIONSHIP BETWEEN MICROSTRUCTURE AND FATIGUE CRACK PROPAGATION BEHAVIOUR IN TiB_2 PARTICULATE REINFORCED ZA-8 Zn ALLOY

HUA Wenjun(Beijing Institute of Aeronautical Materials; Beijing 100095); WANG Zhirui; ZHANG Jirong( University of Toronto; Canada)(Manuscript received 1 995-06-09; in revised form 1995-1 0-02)

HUA Wenjun(Beijing Institute of Aeronautical Materials; Beijing 100095); WANG Zhirui; ZHANG Jirong( University of Toronto; Canada)(Manuscript received 1 995-06-09; in revised form 1995-1 0-02). RELATIONSHIP BETWEEN MICROSTRUCTURE AND FATIGUE CRACK PROPAGATION BEHAVIOUR IN TiB_2 PARTICULATE REINFORCED ZA-8 Zn ALLOY. Acta Metall Sin, 1996, 32(3): 254-260.

Abstract References Related Articles Recommended Metrics Download:  PDF(689KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The relationships between microstructure, fracture surface and propagation behaviour of fatigue crack in TiB2 particulate reinforced ZA-8 Zn alloy and in the corresponding constitute matrix materials were studied. The present results indicate that the resistance to fatigue crack growth of the employed composite is in general superior to that of constitute matrix materials, especially for the short crack behaviour. This is attributed to (1) the interaction between particle and crack tip decreased the stress intensity ahead of the crack tip,(2) owing to the excellent interface strength,(3) the addition of reinforcement caused the change of matrix microstructure and refined the structure and (4) the bridging function of reinforcement. Finally, the mechanism for the difference in fatigue crack growth behaviour of the two materials was discussed. Correspondent HUA Wenjun, Beijing Institute of Aeronautical Materials, Beijing 100095 Key words:  fatigue crack propagation      interface strength      microstructure      Received:  18 March 1996      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1996/V32/I3/254 1ChinCS,SmithRA．IntJFatikue,1985,7(2):872KumaiShinji,KingJE,KnottJF．FatikueFractEngMaterStruct,1993,15:13RavichandranKS,LarsenJM．MaterSciEng,1992,A153:4994ShangJianKu,RitchieRO．In:EverettRK,ArsenaultRJ,eds,MetalMatrixComposites:MechanismsandProperties,NewYork:Academicpress,1991:2555SureshS．FatigueMater,CambrigeSolidStateScienceSeries,1991,2956WangZhirui,ZhangJirong．MaterSciEng,1993:171:857AtkinsonC．IntJEngSci,1972,10:458KassamZnlfikar,ZhangRJ,WangZhirui．FiniteElementSimulalionofStressDistributtonatCrackTipinParticlesMetalMatrixComposites,UnipublishedResearch,UniversityofToronto,19949KumaiShinji,KingJE,KnottJF．FatigueFractEngMaterStrut,1990,13:511 [1] WANG Lei, LIU Mengya, LIU Yang, SONG Xiu, MENG Fanqiang. 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