Microstructural characteristics of forged and heat treated Inconel-718 disks
Microstructural characteristics of forged and heat treated Inconel-718 disks
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DOI：
10.1016/j.matdes.2013.06.004
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发表时间：
2013-12-01
影响因子：
8.4
通讯作者：
Koul, A. K.
中科院分区：
文献类型：
--
作者：
Chamanfar, A.;Sarrat, L.;Koul, A. K.
研究了锻造和热处理 Inconel-718 圆盘从中心到边缘的微观结构演变。具体来说，一次碳化物、晶粒尺寸、γ''、γ'、δ和二次碳化物颗粒的演变是当前研究的重点。事实上，这些微观结构特征的表征对于预测合金蠕变和疲劳寿命的模型至关重要。本研究通过开发一种新方法，准确可靠地揭示了锻造和热处理 Inconel-718 中的晶界。通过微观结构研究，在锻造态和热处理盘中观察到从中心到边缘的晶粒尺寸、体积分数、尺寸和析出物颗粒间间距的不均匀性。微观结构的不均匀性导致圆盘中心到边缘的硬度发生显着变化。 (C) 2013 Elsevier Ltd. 保留所有权利。
Microstructure evolution from center to edge of the as-forged and heat treated Inconel-718 disks was investigated. Specifically, the evolution of primary carbides, grain size, gamma '', gamma', delta, and secondary carbide particles was the focus of the current study. In fact, characterization of these microstructure features is essential for models predicting the creep and fatigue lives of the alloy. Accurate and reliable revealing of the grain boundaries in as-forged and heat treated Inconel-718 was made possible in this study by development of a new method. From microstructure investigations, nonuniformities in grain size, volume fraction, size and inter particle spacing of precipitates from center to edge were observed in both as-forged and heat treated disks. The microstructure nonuniformities resulted in significant variation in hardness from center to edge of the disks. (C) 2013 Elsevier Ltd. All rights reserved.