双峰晶粒尺寸分布的室温塑性研究ppt课件

双峰晶粒尺寸分布的ncNi基合金的室温塑性研究 虢婷2014 3 30 双峰结构 WANGYM MAE Threestrategiestoachieveuniformtensiledeformationinananostructuredmetal J ActaMaterialia2004 52 1699 1709 控制晶粒尺寸 背景 hightensileductility 65 elongationtofailure and30 uniformlongation WANGY CHENM ZHOUF MAE Hightensileductilityinananostructuredmetal J Nature2002 419 912 915 rollingtheCuatliquidnitrogentemperature 180 for3min 200 for3min X Shenetal MaterialsScienceandEngineeringA487 2008 410 416 Twodistinguishedstrainratesensitivity 0 016and0 045 andflowstressactivationvolume 26b3and11b3 wereobtainedatnormalandhighstrainrateandlowstrainrate respectively goodductilityof5 6 11 3 C Guetal ScriptaMaterialia54 2006 579 584 1440 1916MPa 双峰结构是否都能提高塑性 M J N V Prasadetal MaterialsScienceandEngineeringA503 2009 86 91 Y M Wangetal ScriptaMaterialia51 2004 1023 1028 那么 可以从那几个方面来提高纳米晶的塑性呢 粗晶是否能有效弱化nc的应力集中 M J N V Prasadetal MaterialsScienceandEngineeringA503 2009 86 91 nanoscalevoidsornano microcracks 大小晶粒体积分数及尺寸分布 WANGY CHENM ZHOUF MAE Hightensileductilityinananostructuredmetal J Nature2002 419 912 915 highstresses activated conventionalCu dislocationpileupsatthetwinboundaries GUOHE etal naturematerials VOL2 JANUARY2003 dendrites isolatingthehighlylocalizedshearbands L Zhuetal ActaMaterialia60 2012 5762 5772 2010博士论文吉林大学纳米晶镍及镍钴合金 我的实验 3 4 m Cu Ni 下一步实验计划 1 制备nc m以及两个双层NiFe合金四个试样 双层的即在nc上面镀制近一个微米的微米层 2 对其中一个双层结构进行180 退火3