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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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第三代单晶高温合金dd33固溶处理中组织的演变*
Keywords: 金属材料,单晶高温合金,固溶处理,微观组织,共晶
Abstract:
？通过金相显微镜(om)、扫描电镜(sem)和电子探针(epma)等手段研究了第三代单晶高温合金dd33在固溶处理过程中组织的演变。结果表明:在第三代单晶高温合金dd33中,枝晶间g'相在1310℃保温时明显长大,而在1320℃/2h固溶后完全溶解;(g+g')共晶在高于1320℃时显著溶解;mc碳化物在固溶处理过程中发生溶解,由草书体状向颗粒状转变,促进枝晶间g'相的长大;随着固溶温度的提高共晶g'相中al、ta、cr、co等元素的偏析加剧,这一现象可能是上坡扩散引起的。
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