t���t�yVol���No������l�st�������KACTAMETALLURGICASINICAMar�����pp��������UYiDbQ�W�AJFU�I��fBU������T���cX�xhG�v������������n�N�����E�������������c����O�����Q�c�v�CD��E�������������c���n��E��������z��mmJ�����T���MC������Bt�d��x��w��B�L�V��Q������x�xp�kpZ�����a��xfxp��Wd���xp��q�f�p����T��V�L����S�a�O�F��y��Kp�S�������������S��jfa����d��UDFd���T��V�L�xp��U�lf�Uv�h�����P���q��AagF���S��A����a��y�fHt�������x��a���xpp���k�RZEt�d��x�MC��������k�mLOaVTG�����qu�leAq��V�������������������������EFFECTSOFPOST�WELDHEAT�TREATMENTANDSECOND�WELDINGONTENSILEPROPERTIESOFFRIC�TIONSTIRWELDED�����T���ALUMINUMALLOYRENShurong�MAZongyiInstituteofMetalResearch�ChineseAcademyofSciences�Shenyang������CHENLiqingTheStateKeyLaboratoryofRollingandAutomation�NortheasternUniversity�Shenyang������ZHANGYuzhengCollegeofSciences�NortheasternUniversity�Shenyang������Correspondent�MAZongyi�professor�Tel���������������E�mail�zyma�imr�ac�cnSupportedbyNationalOutstandingYoungScientistFoundation�No����������andHundredTalentsProgramofChineseAcademyofSciencesManuscriptreceived����������ABSTRACT�mmthick�����T���aluminumalloyrolledplatewasfrictionstirwelded�andthee�ectsofpost�weldheat�treatmentandsecond�weldingoftheweldbackonthetensilepropertywereinvestigated�Theresultsshowthatthesingle�weldedsampleisdefect�freeandthetransversestrengthoftheweldis���ofthebasematerials�However�alazy�S�lineappearedinthenuggetzoneaszigzagcrackanddiscontinuouscavitiesafterpost�weldT��treatment�Withincreasingsolutiontemperature�the�S�lineandabnormalgraingrowthbecameevident�Afterpost�weldT��treatment�theVickershardnessoftheweldwasrestoredtothelevelofparentmaterial�butthestrengthandelongationweresigni�cantlyreducedduetothecrackinitiationandpropagationalongthe�S�line�Thetensilepropertiesweregreatlyimprovedaftersecond�weldingoftheweldback�KEYWORDSfrictionstirwelding�aluminumalloy�solidsolution�tensileproperty��d�S�m��X��h�������������o��aO�h��G��z�������������j���J��n�����m��V����L�������R��rJ�o���w�P�s�c���frictionstirwelding�iIFSW�����NW����zo������x���jHi�O������wo�����D�Al�Cu�������D�Al�Zn�Mg�q��LB����O��!���o�w������L����t���N%4T�V.�o*�w�E:m�q�e��!�T�U$S*�o17&jnk%$k^o%IkV&).�q�e4%E:XM�(`xE:.E;*Q<�!�j�S*�o�U$K�17&jVcv1T'ke1o%IkV&Yu�T�U$S*�o&8(TD��t�!�jh�o`|c/5�s|cTC/>Eb�c�&q�f�6�0t2Z�(�o&8(T�Z&=(gp`C%$�!hT�U$S*�oZ&ok^�4���L#o&�8d���s�c��w�����T���LB�x�we#S$)��$'�17&jVcY��o&x�Y��T��U$K�R'<@N(E:�x=,Jo#S$)!�{4�"�o>��#S$)$'re%$&#S$)oR'j#A�o���m!Oo$:pr&���x���:��94T��U$���(�9/>TCEb!i4�"�>�k���:��.=R'/>TCEb!i4�"�a���:��b/>�&t?3/>��[#D>$R�E�RL8o�(�%TCEbo/>=Y&���0t2Z�w4T*/5�%$k^�oo17&j!g7�xT��U$kn*�S*�oo`'��?f*�wcADboh��]b��W�T'ke1oTu�m!OJc%...
