Hot Deformation Behavior of an As-Cast Alloy 718 Ingot.

机译：铸态合金718铸锭的热变形行为。

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The hot deformation characteristics of an as-cast 406mm diameter vacuum induction melted-vacuum arc remelted alloy 718 ingot were investigated as a function of strain, strain rate, and temperature with high temperature compression tests between 950C and 1150C. The compression data exhibited a peak in the flow stress followed by extensive strain softening at low temperatures and essentially constant flow stresses at high temperatures. The observed transition in deformation behavior was attributed to the effects of temperature on strain softening mechanisms, primarily dynamic recovery, adiabatic heating and its effects on dynamic recovery, and shear band formation. The data suggest that hot working in the temperature range of 1050--1150C will enhance uniform breakdown through larger sections. Microstructural analysis with both light and electron microscopy, showed that limited dynamic recrystallization occurred. The results are analyzed to identify mechanisms for microstructural refinement in cast ingots. 26 refs., 17 figs.

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Weis, M. J.; Mataya, M. C.; Thompson, S. W.; Matlock, D. K.;
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年度 1989
页码 1-22
总页数 22
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Chromium Alloys; Iron Alloys; Nickel Base Alloys; Niobium Alloys; Deformation; Microstructure; Compression; Hot Working; Recrystallization; Strain Rate; Strains; Temperature Effects; Very High Temperature; ERDA/360103;

机译：铬合金;铁合金;镍基合金;铌合金;变形;微观结构;压缩;热加工;再结晶;应变速率;应变;温度效应;极高温度; ERDa / 360103;

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Hot Deformation Behavior of an As-Cast Alloy 718 Ingot.

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