金属材料专业介绍(英文版)(ppt 47页)

1,Unit6,AnIntroductiontoMetallicMaterials,2,Weshouldgrasp,Whatisametal?Whatisanalloy?Whatarethedifferencesbetweentheirproperities?Explainsolidsolutionandintermetalliccompound.,3,NewWordsTwo-phasemixtureofasoild-solutionandbsoild-sulition;Single-phasebsolid-solution.单相固溶体单相固溶体与单相固溶体混合单相固溶体,39,Thinkabout.,Q:Giveexamplestoexplainsoildsolutionandintermetalliccompound?A:Forexample,nickelwilldissolvesomealuminum,sothatatlowaluminumcontentsasolidsolutionisproduced.However,iflargeramountsofaluminumareadded,thenaseriesofintermetalliccompounds(forexampleNi3AlandNiAl)areproduced.,40,Doyoustillremember?,roamrumgraphitegrfaitmalleablemliblductiledktailsolublesljublchromiumkrumjmtransitiontrnzinshellel,v.漫游，闲逛，徜徉；n.漫步，漫游，徘徊n.石墨a.有伸延性的，可锻的a.易延展的，柔软的a.可溶解的，可溶的n.铬n.转换，跃迁，过渡n.壳，外壳,41,NewWordsfromPart2I,phaseplasmaprecipitateferriteaustenitelatticeinterstitialcuboidorthorhombictetragonalcrystallography,n.相n.等离子体，等离子区n.沉淀物；vt.沉淀n.铁盐酸，铁素体n.体，奥氏体，碳丙铁n.格子a.空隙的，裂缝的a.立方体的，立方形的a.正方晶的a.四方晶的n.结晶学，晶体学,42,NewWordsfromPart2II,turbinebladepolygonalgemstonesphericalamorphoustransparentpitcoasterviscousinterfacial,n.涡轮n.刀刃，刀片a.多角形的，多边形的n.宝石a.球形的a.无定形的，无晶形的a.透明的n.坑，槽n.垫子，银盘a.粘性的，粘滞的，胶粘的a.界面的，分界面的,43,CentralContentofPart2,Thetextisaboutstructuresofmetalsandalloys,themostfamiliarphasesaresolid,liquid,vaporandplasma.Explaincrystalstructure,atomsarearrangedinadifferentpattern,thepatternismadeupofarepeatingunit.Becauseofthelatticeparameterandtheatomsarearrangeddifferentlywithinthecube,themetalsandalloyshavedifferentstructures-property.Andthesizeoftheatomcanaffectitsstructures-property.Thedifferencesbetweencrystallineandamor