The effect of room temperature pre‐strain on grain boundary cavitation in Nimonic 8oA
The effect of room temperature pre‐strain on grain boundary cavitation in Nimonic 8oA
复制标题
室温预应变对 Nimonic 8oA 晶界空化的影响
DOI：
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发表时间：
1973
期刊：
影响因子：
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通讯作者：
D. Henn
中科院分区：
文献类型：
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作者：
B. Dyson;D. Henn
Nimonic 80 A合金试样在室温下拉伸预应变11%，然后在施加或不施加应力的情况下加热至750°C不同时间。通过高压电子显微镜的检查揭示了大量的球形亚微米直径的空腔。空洞都位于晶界上，但分布不均匀;晶界通常包含许多空洞或根本没有空洞。可以得出结论，空穴是在预应变期间晶界处的脱粘的直接结果，而不是由于任何蠕变过程。
Specimens of the alloy Nimonic 80A have been pre‐strained 11% in tension at room temperature and then heated to 750°C for various times either with or without the application of stress. Examination by means of a high voltage electron microscope revealed large numbers of spherical submicron diameter cavities. The cavities all lay on grain boundaries but were inhomogeneously distributed; a grain boundary usually contained either many cavities or none at all. It is concluded that the cavitation is a direct result of decohesion at the grain boundaries during the pre‐straining and not due to any creep process.