资源描述：
《一种镍基单晶高温合金压缩变形的各向异性》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、第25卷第4期材料研究学报VOI.25No42011年8月CHINESEJOURNALOFMA压,ERIALSRESEARCHAugust2011一种镍基单晶高温合金压缩变形的各向异性*孟杰金涛l,2孙晓峰胡壮麒1.中国科学院金属研究所沈阳1100162.北京科技大学北京100083摘要将一种镍基单晶高温合金在室温沿不同晶体取向)}之缩变形,研究了在试徉表面形成的滑移线和微观组织的变化.结果表明:这种合金(111)取向试样的屈服强度最高,(叫取向的强度最低,(11娜取向的强度居中(001)和(11印取向的试样在压缩变形过程中主要启动八面体滑
2、移系,其中(110)取向明锨观察到双滑移系的开动;而(111)取向的试样则启动了六面体滑移系基体通道枝晶共晶等组织的各向异性,在一定程度以鞠向不同晶体取向合金的变形特征(110)取向试徉的变形组织中形成了大量的层错,而在其它两个取向的试样中则未观察到(111)取向变形后基体通道中的位错密度明显高于其它两个取向,这种高加工硬化率使(111)取向具有高的屈服强度关键词金属材料,镍基单晶高温合金.压缩变形.滑移线,各向异性分类号TG146文章编号1005一3093(2011)04一0355一07ComPressionDeformationofaNie
3、kel一BaseSingleCrystalSuPeralloyofDiferentOrientationsMENGJielJINTaol忍**SuNxiaofenglHUzhuangqil1.玩艺z亡艺eofMotalResoarch,Ch:,,soAeade二yofsezenees,Sh二ya二g了j001百忍Uoive:sit岁ofSei二ea了d几eh二01四夕,Be叮:n夕1000占夕*SupportedbytheNationalBasieResearehprogra:n(973program)ofChinaNo.ZOIOCB
4、6312O6,theNa-tionalNaturalSeieneeFOundatioliofChinaNo.50931004andStateKeyLabofAdvaxleedMetalsandMate-rialsNo.ZO08ZD一07.ManuseriPtreeeivedAugust13,2010;inrevisedfornlFebruary14.2()11.**Towhonzeorrespondeneesho一工l(1beaddresse(l,Tel:(024)23971757,E一,,lail:tjin@inir.ae.enABSTRACTAn
5、iekelbasesingleerystalsuPeralloywaseompressedatroomtemperaturealongthe(001),(110)and(111)orientotions,respeetively.Theevolutionoft卜eSliptraCeSandthemiCrostructureinthedeformationwasinvestigatedbymetallographiemicroseopeandtransmissioneleetronmieroseope.Itwasfoundt卜ateomPressdef
6、ormationdePendsontheerystalorientationandthePreeedeneeoftheeompressyieldstress15:(111).<110)(001).Forthe(001)or<110)orientedspeeimeneompressed4.5%thesliptracesmatehtheoetahedralslipandthesliptraeesinthe(111)orientedallo丫provetoslipalongthe{001}planes.It15notedthatdeformationoft
7、he(110)orientedalloytakesp.aeeb丫aetivationoftwo5IIPsystems.TheanisotroPyofthematrixehannel,dendritiesegregationandeuteetieleadstotheehangeofdeformationbehaviorforvariousorientations.Forthe(110)orientedalloy守partieleseutbystaeking怕ult.Thehighdensedisloeationofthe(111)orientedal
8、loyeontributestoitshighyieldstrength.KEYWORDSmetalliem
