铝合金薄板激光拼焊工艺与其成形性能分析

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1、withductile仔acmrecharacteristicsundertheactlonoftensileloading．’I’heshallowdlmplesandspecimells行acturedwithoutobViousplasticflowexplainedthattheplasticityofTWBwasinf．eriortobasemetal．AsmecuppingtestresultsoflaSerTWBshown：crackinggenerallytookplaceinthenanDwHAZthatdeViatefromwelded

2、beamforthec眄stal黟ainsbecamemu曲a11dresultedinthereductionoftheplasticityandtoughnessthee丘Iectofthethenllalcycling．ThecuppingindexofTWBwassli曲tlylowerthaIlthatofbasemetal，whichindicatedthatthebul百ngformabilityoftheTWBwasworsecomparedtobasemetal．Andthefo吼inglimitdia孕锄(FLD)displayedth

3、atthefonIlinglimitoflaserTWBof6061aluminumalloywasintheoreticalultimatezoneofsaf．ety．Du^ngthenum硎calsimulationprocessofcuppingtestDYNAFORMso胁are，onlythelocationoftheweldedbe锄wasconsideredbuti印oredthetypeofit，嬲dtheresultsshowedthat：simulationcrackingofthebasemetalwaseasilyoccurredi

4、nme10werbandofmecuppinghead，andthethicl(nessVariedeVenlywithoutdiscontinui呗simulationresultswerebasicanythes锄easthepmcticaltests．ThesimulationCrackingoftheTWBwaseasilyoccurredattheweldedseambelowmecuppingheadtheinflu锄ceoftheweldedseam，alldmesimulationresultsweresli曲tlydi仃打fbmthepr

5、acticalteststhatpossiblyrelatedtothesetoftheweldedse锄．Tllethicl(IlessV撕edrelative“eIllyfortheweldedse啪wasnanDw’andthesimulationcuppingindexoftheTwBwassli曲tlylowcrthanthatofbasemetal，itindicatedthatthebul西ngfo锄abiIityoftheTWBwasworsethanbasemetal．Keywords：606laluminumalloysheet；TIG

6、tailor_welded；Lasertailor_welded；formability；DYNAFoRMsimulation目录第一章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯1．1铝及铝合金材料的发展与应用⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．1．1．1铝及铝合金材料的特点⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯1．1．2铝及铝合金材料的应用与发展现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯1．1．3铝合金材料在汽车行业中的发展前景⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯1．2拼焊板应用发展研究⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

7、⋯⋯⋯⋯⋯⋯1．3铝合金拼焊板研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯1．3．1铝合金拼焊板材料应用研究⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯1．3．2铝合金拼焊板焊接工艺研究⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯1．3．3铝合金拼焊板成形性能研究⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯1．4本课题研究目的和意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯1．5本课题主要研究内容⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯第二章试验材料焊接性分析及焊接工艺选择⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯2．1试验选材⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

8、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯2．2材料焊接性分析⋯⋯⋯