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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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定向凝固Ni_3Al合金高温变形后的显微组织特征
, PP. 351-355
Keywords: 定向凝固,Ni_3Al,高温变形,显微组织
Abstract:
利用金相、扫描电镜和透射电子显微镜研究了定向凝固Ni3Al合金高温变形后的显微组织特征研究结果表明，当变形速率较快时，原始柱状晶晶界无明显变化，晶内无明显亚结构存在；当变形速率较慢，合金呈现超塑变形时，变形初期柱状晶晶界呈现“锯齿状”，后期原始柱状晶界消失，代之以晶粒尺度约为15mm的晶粒带，晶粒带中既有小角度晶界，也有大角度晶界合金在超望变形时发生了连续回复与再结晶的过程.
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