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OALib Journal期刊
ISSN: 2333-9721
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定向凝固NiAl合金的微观组织和高温力学性能Ⅰ.微观组织和韧脆转变温度
, PP. 1139-1143
Keywords: 韧脆转变温度,微观组织,NiAl合金
Abstract:
利用ＳＥＭ和ＴＥＭ研究了热等静压处理（ＨＩＰ）后的ＮｉＡｌ－２８Ｃｒ－５．５Ｍｏ－０．５Ｈｆ定向凝固合金微观组织与结构.该合金主要是由ＮｉＡｌ相、Ｃｒ（Ｍｏ）相和少量聚集在相界处的Ｈｅｕｓｌｅｒ相组成.通过对该合金高温拉伸实验发现合金的韧脆转变温度（ＢＤＴＴ）与应变速率有关,应变速率提高一个数量级,韧脆转变温度提高５０Ｋ.
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