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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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GH4049镍基高温合金疲劳—蠕变行为及变形结构研究
, PP. 955-959
Keywords: 镍基,高温合金,疲劳,蠕变,形变结构
Abstract:
研究了ＧＨ４０４９镍基高温合金在７００℃,±０．４５％应变控制条件下的疲劳－蠕变行为.发现合金在循环初始阶段呈硬化趋势,随后呈软化趋势,利用透射电镜观察了合金在疲劳－蠕变不同阶段的形变结构,利用会聚束电子衍射技术研究了合金γ／γ相错配度在疲劳－蠕变中的变化规律,结果表明,γ／γ相的共格性在形变过程中未受到损失均匀形变区内,基体位错密度迅速增加,导致合金２形变初始硬化.
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