^THE FRACTURE CHARACTERISTICS OF δ-Al_2O_3/Al ALLOY COMPOSITES

1.IntroductionThefracturemechanismanalysisofshortfiberreinf0rcedmetalmatrixc0mp0sites(SFRMMCs)isaveryimp0rtantaspectinthemicrthstructuralstudy0fthec0mpositemechanicalperformances.Generally,therearethreekinds0fthefailuremodesinshortfiberreinforcedmetalmatrixc0mpositesll]:(1)Thet0ughfractUrecausedbyinitiating,growingandc0alescingofthev0idsinthematrix0fcomposite;(2)Thebrittlefracture0fthefibers;(3)Thedebondingoftheinterfacebetweenfiberandmatrix.Inagivenc0mposite,thesefailurem0desmaytakeplaces…