典型文献
Bulk nanocrystalline W-Ti alloys with exceptional mechanical properties and thermal stability
文献摘要：
Nanocrystalline(NC)W metals and alloys often exhibit higher radiation tolerance and strength than their coarse-grained counterparts.However,their thermal stability is low,making it difficult to achieve bulk NC W metals and alloys by consolidation using conventional techniques such as pressure-less sintering,hot-explosive-compaction sintering,and spark plasma sintering.Here we report the synthesis and mechanical properties of bulk NC W100-xTix(x=10 at.％-30 at.％)alloys prepared by consolidating mechanically al-loyed NC powders under a high-temperature/high-pressure condition.Adding 20 at.％-30 at.％Ti largely improves the sinterability of NC W-Ti alloy powders.The room-temperature microhardness and compres-sive yield strength of consolidated bulk NC W80Ti20 alloy are～16.9 and 6.0 GPa,respectively,which are mainly caused by grain boundary strengthening and significantly higher than those of previously re-ported W and W alloys.The ultimate compressive strength of bulk NC W80Ti20 measured between 900 and 1100℃deceases with increasing temperature.This behavior can be explained by the activation of Rachinger grain boundary sliding.No grain growth is observed in bulk NC W80Ti20 after compression at 1000℃.Theoretical calculation suggests that it is the segregation of Ti at grain boundaries that decreases the specific grain boundary free energy and makes the NC W80Ti20 alloy thermodynamically stable.
文献关键词：
中图分类号：
作者姓名：
H.X.Xue;X.C.Cai;Visualization;B.R.Sun;X.Shen;C.C.Du;X.J.Wang;Project administration;T.T.Yang;S.W.Xin;T.D.Shen
作者机构：
Clean Nano Energy Center,State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China;CSSC 723rd Research Institute,China State Shipbuilding Corporation Limited,Yangzhou 225000,China
文献出处：
引用格式：
[1]H.X.Xue;X.C.Cai;Visualization;B.R.Sun;X.Shen;C.C.Du;X.J.Wang;Project administration;T.T.Yang;S.W.Xin;T.D.Shen-.Bulk nanocrystalline W-Ti alloys with exceptional mechanical properties and thermal stability)[J].材料科学技术（英文版）,2022(19):16-28
A类：
xTix,loyed,sinterability,W80Ti20,deceases,Rachinger
B类：
Bulk,nanocrystalline,alloys,exceptional,properties,thermal,stability,Nanocrystalline,NC,metals,often,exhibit,higher,radiation,tolerance,than,their,coarse,grained,counterparts,However,low,making,difficult,achieve,bulk,by,consolidation,using,conventional,techniques,such,pressure,less,sintering,hot,explosive,compaction,spark,plasma,Here,report,synthesis,W100,prepared,consolidating,mechanically,powders,under,temperature,condition,Adding,largely,improves,room,microhardness,yield,consolidated,GPa,respectively,which,mainly,caused,boundary,strengthening,significantly,those,previously,ported,ultimate,compressive,measured,between,increasing,This,behavior,explained,activation,sliding,No,growth,observed,after,compression,Theoretical,calculation,suggests,that,segregation,boundaries,decreases,specific,free,energy,makes,thermodynamically,stable
AB值：
0.504802
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