纯钛板材冷拉成形过程中的微观组织与织构演变（英文）.pdf

《纯钛板材冷拉成形过程中的微观组织与织构演变（英文）.pdf》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。

1、Availableonlineat、^n^^^f．sciencedirect．comTransactionsof镰静ScienceDirectNoilferrousMetalsSocietyofChinaPressTrans．NonferrousMet．Soc．China22(2012)496—502WWW．tnmsc．cnMicrostructureandtextureofcommerciallypuretitaniumincolddeepdrawingZHANGXu—hu，TANGBin，ZHANGXia

2、—lu，KOUHong-ehao，LIJin—shan，ZHOULianStateKeyLaboratoryofSolidificationProcessing，NorthwesternPolytechnicalUniversity,Xi’an710072，ChinaReceived21January2011；accepted10December2011Abstract：Thedevelopmentofmicrostructureandtextureduringcolddeepdrawingofcommerc

3、iallypuretitanium(CP—Ti)wasinvestigated．Threepans，stretchingregion，drawingregionandflangeregion，weresequentiallyformedinthedeepdrawingprocessofthehemisphericsurfacepart．withreferencetodeformationmodesandstrainregimes．Resultsshowthattheplasticstrainisaccommo

4、datedbydislocationslipanddeformationtwinninginthewholedeepdrawingprocess．ThetextureoftheCP．Tisheetanditsdrawnpartconsistsofrollingtexturecomponentandrecrystallizationtexturecomponent．Theintensityandtyoeoftheinitia1texturevariedduringthedrawingprocessarerela

5、tedtotheproductionofde-formationtwinninganddislocationslip．Twinningweakenstheinitialtexturebyrandomizingtheorientationsofcrystals．especiallyfortherecrystallizationtexture．Therecrystallizationtextureinthedrawingregiondisappearsduetothesignificantformingoftwi

6、nning．Furthermore，overdrawingwouldresultinthepredominanceofdislocationslipandthetextureisstrengthened．Keywords：puretitanium；deepdrawing；microstructure；texturecups[2，12]andthin—walledhemisphericsurfacepartare1Introductionthetypicalapplications[13]．Theforming

7、processofthehemisphericsurfacepartisdiferentfromthenormalRecentlNcommercialpuretitanium(CP．Ti)drawndeepdrawingsuchassquareorcylindricaldrawnpart．Itparthasbeenwidelyappliedinthechemical[1,2]andisacomplexprocesscomprisedbystretchingandaerospace[394]industries

8、duetoitscorrosionresistance，drawing[14]．However，therearefewliteraturesfocusinggoodweldingproperty,lowdensityandhighspecificonthemicrostructureandtexturedevelopmentofthestrength．Becauseofitshexagonalclo