研究了定向凝固NiAl-15Cr合金的显微组织、高温拉伸性能和韧脆转变条件.结果表明:该合金显微组织为枝晶状,枝晶干为β-NiAl相、枝晶间为γ相和过渡层为γ′相;合金具有很好的高温塑性和高温强度,并在1 323 K时表现出类超塑性行为;同时它具有明显的韧脆转变温度,当应变速率为1.11×10-4 s-1时,韧脆转变温度为873 K,应变速率提高两个数量级后,韧脆转变温度升高约150 K.
所属栏目
材料性能及其应用
收稿日期
2009/4/132010/3/12
作者单位
肖思文:湖南科技大学机电工程学院, 湘潭 411201
备注
肖思文(1968-),女,湖南娄底人,高级工程师,硕士.
引用该论文:
XIAO Si-wen.High Temperature Tensile Properties and Brittle-to-Ductile Transition of Directionally Solidified NiAl-15Cr Alloy[J].Materials for mechancial engineering,2010,34(5):60～63
肖思文.定向凝固NiAl-15Cr合金的高温拉伸性能和韧脆转变条件[J].机械工程材料,2010,34(5):60～63
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