雙峰晶粒尺寸分布的ncNi基合金的室溫塑性研究虢婷

2014-3-30雙峰結(jié)構(gòu)WANGYM.MAE.Threestrategiestoachieveuniformtensiledeformationinananostructuredmetal[J].ActaMaterialia2004,52:1699-1709.室溫nc高強(qiáng)度高塑性應(yīng)變硬化應(yīng)變速率硬化控制晶粒尺寸背景hightensileductility—65%elongationtofailure,and30%uniformlongation.WANGY,CHENM,ZHOUF,MAE.Hightensileductilityinananostructuredmetal[J].Nature2002,419:912-915.rollingtheCuatliquidnitrogentemperature180℃for3min200℃for3minX.Shenetal./MaterialsScienceandEngineeringA487(2008)410–416Twodistinguishedstrainratesensitivity(0.016and0.045)andflowstressactivationvolume(26b3and11b3)wereobtainedatnormalandhighstrainrateandlowstrainrate,respectively.goodductilityof5.6–11.3%,C.Guetal./ScriptaMaterialia54(2006)579–5841440–1916MPa雙峰結(jié)構(gòu)是否都能提高塑性？M.J.N.V.Prasadetal./MaterialsScienceandEngineeringA503(2009)86–91Y.M.Wangetal./ScriptaMaterialia51(2004)1023–1028那么，可以從那幾個(gè)方面來提高納米晶的塑性呢？粗晶是否能有效弱化nc的應(yīng)力集中？M.J.N.V.Prasadetal./MaterialsScienceandEngineeringA503(2009)86–91nanoscalevoidsornano/microcracks大小晶粒體積分?jǐn)?shù)及尺寸分布WANGY,CHENM,ZHOUF,MAE.Hightensileductilityinananostructuredmetal[J].Nature2002,419:912-915.highstressesactivatedconventionalCu-dislocationpileupsatthetwinboundariesGUOHE*etal./naturematerials|VOL2|JANUARY2003dendritesisolatingthehighlylocalizedshearbandsL.Zhuetal./ActaMaterialia60(2012)5762–57722010博士論文吉林大學(xué)納米晶鎳及鎳鈷合金我的實(shí)驗(yàn)3~4mCuNi下一步實(shí)驗(yàn)計(jì)劃1.制備nc,m以及兩個(gè)雙層NiFe合金四個(gè)試樣，雙層的即在nc上面鍍制近一個(gè)微米的微米層。2.對其中一個(gè)雙層結(jié)構(gòu)進(jìn)