KINETICS OF GRAIN GROWTH IN 718 Ni-BASE SUPERALLOY

被引：19

作者：

Huda, Z. ^{[1
]}

Zaharinie, T. ^{[2
]}

Metselaar, I. H. S. C. ^{[2
]}

Ibrahim, S. ^{[2
]}

Min, Goh J. ^{[2
]}

机构：

[1] Nilai Univ, Dept Engn, Nilai 71800, Negeri Sembilan, Malaysia

[2] Univ Malaya, Dept Mech Engn, Kuala Lumpur 50603, Malaysia

来源：

ARCHIVES OF METALLURGY AND MATERIALS | 2014年 / 59卷 / 03期

关键词：

Nickel-base superalloy; microstructures; grain growth; kinetics; activation energy; DEFORMATION; ALLOY; BORON;

D O I：

10.2478/amm-2014-0143

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The Haynes (R) 718 Ni-base superalloy has been investigated by use of modern material characterization, metallographic and heat treatment equipment. Grain growth annealing experiments at temperatures in the range of 1050-1200 degrees C (1323-1473K) for time durations in the range of 20 min-22h have been conducted. The kinetic equations and an Arrhenius-type equation have been applied to compute the grain-growth exponent n and the activation energy for grain growth, Q(g), for the investigated alloy. The grain growth exponent, n, was computed to be in the range of 0.066-0.206; and the n values have been critically discussed in relation to the literature. The activation energy for grain growth, Q(g), for the investigated alloy has been computed to be around 440 kJ/mol; and the Q(g) data for the investigated alloy has been compared with other metals and alloys and ceramics; and critically analyzed in relation to our results.

引用

页码：847 / 852

页数：6

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