|
OALib Journal期刊
ISSN: 2333-9721
费用：99美元
|
|
|
|
应变速率对一种无铼单晶高温合金低周疲劳性能的影响
Keywords: 金属材料,单晶高温合金,低周疲劳,应变速率
Abstract:
？研究了一种无铼镍基单晶高温合金在1223k、不同应变速率(5×10-4s-1、1×10-3s-1、5×10-3s-1、1×10-2s-1)条件下的低周疲劳行为。结果表明:在四种应变速率条件下,合金均表现出循环稳定。随着应变速率的增加,合金的疲劳寿命逐渐增加,且其半寿命稳定滞后回线环内面积逐渐减少,表明低应变速率合金更容易积累蠕变塑性变形。疲劳裂纹源均萌生于试样表面,随着应变速率的增加,疲劳过程中产生的塑性变形越来越少,疲劳裂纹扩展区的面积逐渐增大。低应变速率时,较大的塑性变形导致合金取向发生明显的偏转,诱发多滑移系开动进而形成位错网;反之,高应变速率时,合金没有产生明显的塑性变形,只有单一方向的位错塞积形成位错束。
| [1] | 1d.w.maclachlan,d.m.knowles,fatiguebehaviourandlifingoftwosinglecrystalsuperalloys,fatiguefract.eng.mater.struct.,24,503(2001)
|
| [2] | 2r.c.reed,thesuperalloysfundamentalsandapplications(newyork,cambridgeuniversitypress,2006)p.170–194
|
| [3] | 3jiayuxian,jintao,liujinlai,sunxiaofeng,huzhuangqi,anisotropiccreepinani–basedsinglecrystalsuperalloy,actametallurgicasinica,45(11),1364(2009)
|
| [4] | (贾玉贤,金涛,刘金来,孙晓峰,胡壮麒,一种镍基单晶高温合金的各向异性,金属学报,45(11),1364(2009))
|
| [5] | 4tiansugui,zhouhuihua,zhangjinghua,yanghongcai,xuyongbo,huzhuangqi,formationandroleofdialocationnetworksforasinglecrystalnickel-basesuperalloyduringhightemperaturecreep,chinesejournalofmaterialsresearch,13(6),632(1999)
|
| [6] | (田素贵,周慧华,张静华,杨洪才,徐永波,胡壮麒,一种单晶镍基合金蠕变期间位错网的形成与作用,材料研究学报,13(6),632(1999))
|
| [7] | 6h.zhou,y.ro,h.harada,y.aoki,m.arai,deformationmicrostructureafterlow-cyclefatigueinafourthgenerationni-basescsuperalloytms-138,mater.sci.eng.,a381,20(2004)
|
| [8] | 7x.f.ma,h.j.shi,j.l.gu,z.x.wang,h.harders,t.malow,temperatureeffectonlow-cyclefatiguebehaviorofnickel-basedsinglecrystallinesuperalloy,acta.mech.solida.sin.,21(4),289(2008)
|
| [9] | 8j.telesman,l.j.ghosn,fatiguecrackgrowthbehaviorofpwa1484singlecrystalsuperalloyatelevatedtemperatures,j.eng.gas.turb.power.,118,399(1996)
|
| [10] | 9b.f.antolovich,a.saxena,s.d.antolovich,fatiguecrackpropagationinsinglecrystalcmsx-2atelevatedtemperature,j.mater.eng.perform.,2,489(1993)
|
| [11] | 10z.f.yue,z.z.lu,theinfluenceofcrystallographicorientationandstrainrateonthehigh-temperaturelow-cyclicfatiguepropertyofanickel-basesingle-crystalsuperalloy,matall.mater.trans.,a,29a,1093(1998)
|
| [12] | 11e.fleury,l.r′emy,lowcyclefatiguedamageinnickel-basesuperalloysinglecrystalsatelevatedtemperature,mater.sci.eng.,a167,23(1993)
|
| [13] | 12v.brien,b.d′ecamps,lowcyclefatigueofanickelbasedsuperalloyathightemperature:deformationmicrostructures,mater.sci.eng.,a316,18(2001)
|
| [14] | 14g.a.leverant,m.gell,theinfluenceoftemperatureandcyclicfrequencyonthefatiguefractureofcubeorientatednickel-basesuperalloysinglecrystal,metall.trans.a,6a,367(1975)
|
| [15] | 15c.laird,theinfluenceofmetallurgicalstructureonthemechanismsoffatiguecrackpropagation,fatiguecrackpropagation,astmstp415,philadelphia,131(1967)
|
| [16] | 16d.wang,investigationofmicrostructureandcreepmechanismoftwodirectionallysolidifiedni-basesuperalloys,ph.ddissertation,instituteofmetalresearchchineseacademyofsciences(2010)
|
| [17] | (王栋,两种定向凝固单晶高温合金微观组织和蠕变机制的研究,博士学位论文,中国科学院金属研究所(2010))
|
| [18] | 17j.h.zhang,z.q.hu,y.b.xu,z.g.wang,dislocationstructureinasingle-crystalnickle-basesuperalloyduringlowcyclefatigue,metall.trans.a,23a,1253(1992)
|
| [19] | 5j.z.yi,c.j.torbet,q.feng,ultrasonicfatigueofasinglecrystalni-basesuperalloyat1000},mater.sci.eng.,a443,142(2007)
|
| [20] | 13j.j.yu,x.f.sun,t.jin,n.r.zhao,h.r.guan,z.q.hu,hightemperaturecreepandlowcyclefatigueofanickelbasesuperalloy,mater.sci.eng.,a527,2379(2010)
|
Full-Text
|
|
Contact Us
service@oalib.com QQ:3279437679 
WhatsApp +8615387084133
|
|
