邓莉萍,鲁世强,汤斌兵,雷志立,高军.NbCr2/ Nb合金高温力学行为[J].稀有金属材料与工程,2019,48(5):1534~1538.[Deng Liping,Lu Shiqiang,Tang Binbing,Lei Zhili,Gao Jun.High temperature mechanical behavior of NbCr2/ Nb alloy[J].Rare Metal Materials and Engineering,2019,48(5):1534~1538.]
NbCr2/ Nb合金高温力学行为
投稿时间:2017-11-03  修订日期:2018-01-02
中文关键词:  NbCr2/ Nb合金  高温力学性能  位错  层错/孪晶
基金项目:国家自然科学基金(51074092),江西省自然科学基金(20161BAB206113),江西省教育厅落地计划项目(KJLD14056),江西省教育厅科技计划(GJJ160677)
中文摘要:
      在800-1200℃的变形温度,0.001-0.1s-1的应变速率下对通过机械合金化+热压工艺制备的成分为Nb-22.5Cr的 NbCr2/ Nb合金进行了高温压缩试验,研究了合金的高温力学行为,并通过透射电子显微镜观察分析了合金的变形机制。结果表明:NbCr2/ Nb合金的峰值强度随着变形温度的升高,应变速率的降低而下降。基体Nb的变形机制主要为位错的滑移;而NbCr2的变形机制为通过层错,孪晶,不全位错等方式进行。
High temperature mechanical behavior of NbCr2/ Nb alloy
英文关键词:NbCr2/ Nb alloy  high-temperatureSmechanicalSproperties  dislocations  stacking fault/twins
英文摘要:
      Compression tests between 800 and 1200℃ and 10-3 and 10-1s-1 and conventional transmission electron microscopy have been employed to investigate the high temperature mechanical behavior and the deformation mechanisms of the NbCr2/Nb alloy with the composition Nb-22.5 at.% Cr, prepared by mechanical alloying and hot pressing process. The results show that the peak strength of NbCr2/Nb alloy decreases with the increase of deformation temperature and the decrease of strain rate. The main deformation mechanism of Nb matrix is the slip of dislocation. While, the deformation mechanism of the Laves phase NbCr2 is through by stack fault/ twins and partial dislocation.
作者单位E-mail
邓莉萍 南昌航空大学 denglp790331@aliyun.com 
鲁世强 南昌航空大学  
汤斌兵 南昌大学 高等研究院  
雷志立 南昌航空大学  
高军 南昌航空大学  
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