胀形对TC4合金机匣残余应力的影响.pdfVIP

HotWorkingTechnology2022,Vol.51,No.15

胀形对TC4合金机匣残余应力的影响

柏哲鹏，余心宏，文丰茜

(西北工业大学材料学院，陕西西安710072)

摘要：通过胀形来调控机匣环件的残余应力状态并探究了工艺参数对胀形效果的影响。利用盲孔法对几组

TC4环件的残余应力进行了测量。以雷达图、标准差、均值、极差表征了残余应力状态。得出胀形前后环件残余应力

分布的变化规律，总结出不同胀形量对于环件残余应力调控的影响规律。使用ABAQUS有限元软件模拟不同胀形

量对环件残余应力状态的影响。结果表明，胀形后环件整体的残余应力水平呈下降趋势，各个面的残余应力分布均

匀性得到提高，应力集中现象有所缓解。随胀形量增大，残余应力均匀化效果变得越好。但是过大的胀形量也会引

人残余应力。

关键词：环件；胀形；残余应力；盲孔法；有限元模拟

D0I:10.14158/ki.

中图分类号：TG306文献标识码：A

InfluenceofBulgingonResidualStressofTC4AlloyCasing

BAIZhepeng,YUXinhong,WENFengqian

(SchoolofMaterials,NorthwestermnPolytechnicalUniversity,Xian710072,China)

Abstract:Thestateofresidualstressinthecasingringwasregulatedbybulging,andtheinfluenceoftechnological

parametersonthebulgingeffectwasexplored.TheresidualstressesofseveralgroupsofTC4ringsweremeasuredbyblind

holemethod.Theresidualstressstatewascharacterizedbyradarchart,standarddeviation,meanvalueandrange.The

variationlawofresidualstressdistributionofringpartsbeforeandafterbulgingwasobtained,andtheinfluencelawof

differentbulgingamountontheregulationofresidualstressofringpartswassummarized.ABAQUSfiniteelementsoftware

wasusedtosimulatetheinfluenceofdifferentbulgingquantitiesontheresidualstressstateofringparts.Theresultsshowthat

theresidualstressleveloftheringdecreases,theuniformityofresidualstressdistributiononeachsurfaceisimproved,andthe

stressconcentrationphenomenonisalleviated.Withtheincreaseofbulgingamount,thehomogenizationefectofresidual

stressbecomesbetter.However,excessivebulgingamountwillalsointroduceresidualstress.

Keywordsring