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金属学报  1994, Vol. 30 Issue (9): 394-398    
  论文 本期目录 | 过刊浏览 |
Ni_3Al-Cr-Zr-B-Mg合金的高温晶界脆性
杜国维;王政;张德志;肖纪美
北京科技大学
HIGH TEMPERATURE INTERGRANULAR EMBRITTLEMENT OF Ni_3Al-Cr-Zr-B-Mg ALLOY
D U Guowei;WANG Zheng;ZHANG Dezhi;XIAO Jimei(University of Science and Technology Beijing)(Manuscript received 27 January;1994)
引用本文:

杜国维;王政;张德志;肖纪美. Ni_3Al-Cr-Zr-B-Mg合金的高温晶界脆性[J]. 金属学报, 1994, 30(9): 394-398.
, , , . HIGH TEMPERATURE INTERGRANULAR EMBRITTLEMENT OF Ni_3Al-Cr-Zr-B-Mg ALLOY[J]. Acta Metall Sin, 1994, 30(9): 394-398.

全文: PDF(327 KB)  
摘要: 应用电镜及X线衍射技术,研究了高温下Ni_(75)Al_(16.6)Cr_(7.84)Zr_(0.45)B_(0.1)Mg_(0.01)合金晶界失效行为。经1180℃保温,由于偏聚晶界区Mg含量(at.-%)达15-19。同时Zr含量(at,-%)明显增大可达28-33;并观察到局部晶界共晶熔化现象。通过1000℃固溶及变温热循环处理,合金中晶内出现CrN相沉淀,沿晶界有Cr2(C,N)相析出。
关键词 Ni_3Al基合金晶界偏聚共晶熔化非平衡偏聚    
Abstract:By electron microscopy and X-ray diffraction techniques, the high temperature intergranular failure of Ni75Al16.6Cr7.84Zr0.45B0.1Mg0.01 alloy has been studied. The content of Mg is about 15-19 at.-%. in the region of grain boundary in the alloy due to segregation after prior exposure at 1180℃, the content of Zr is 28-33 at.-%; and the localized eutectic grain boundary melting in the alloy was observed. The precipitation of CrN inside the grains and Cr2(C,N) along the grain boundaries occurred by solid solution and thermal cycling treatments.Correspondent: DU Guowei, associate professor.(Departement of Materials Physics,University of Science and Technology, Beijing, Beijing 100083)
Key wordsNi_3Al-base alloy    grain boundary segregation    eutectic melting    noneqilibrium segregation
收稿日期: 1994-09-18     
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