STUDY IN FO RMATION OF SUB GRAINS AND MICROCRACKS IN WEIDED METAIS UNDER FATIGUE LOAD

查看全文 作　　者：S.Z.Dong ,J.B.Li, X.H.Zhang and J.Zhang Shenyang University ,Shenyang 110044 ,China 出　　处：《Acta Metallurgica Sinica(English Letters)》索引1999年第12卷第4期,共6页 摘　　要：With TEM( Transmission Electron Microscope) ,ithasobserved and analyzedthatforming processof Sub grainsand position offormingfatigue microcracksarein Welded metalsofthe16 Mnsteelundertensile tensilestress. Theresultsindicatedthattheforming processof Sub grainsfrom dislocationtanglecellstotheSub grains. Thepositionofformingfatigue micro crackisattheoxidativeinterfaceand granular noncrgstallines and Sub boundaries. Thece mentiteineutectoidsafterfracture may beproduced microcracks. 关 键 词：fatigueload WELDED METALS FORMING SUB grains crackinitiation