The role of composition on the extent of individual strengthening mechanisms in polycrystalline Ni-based superalloys

被引：67

作者：

Goodfellow, A. J. ^{[1
]}

Galindo-Nava, E. I. ^{[1
]}

Schwalbe, C. ^{[1
]}

Stone, H. J. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Mat Sci & Met, 27 Charles Babbage Rd, Cambridge CB3 0FS, England

来源：

MATERIALS & DESIGN | 2019年 / 173卷

基金：

英国工程与自然科学研究理事会;

关键词：

Superalloy; Strengthening mechanisms; Precipitation; Anti-phase boundary energy; Coherency; Solid solution strengthening; RESOLVED SHEAR-STRESS; HEAT-TREATMENT; TRANSITION-METAL; FLOW-STRESS; NICKEL; MICROSTRUCTURE; BEHAVIOR; NI3AL; YIELD; TEMPERATURE;

D O I：

10.1016/j.matdes.2019.107760

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Models of the multiple strengthening mechanisms operating concurrently in nickel-based superalloys have been combined to provide predictions of the overall yield strength. Although these are established models, when all of the individual strengthening mechanisms were taken into account, it was found that these models did not compare well in magnitude to experimental data for the yield strength of several commercial alloys, although the trends were well described. To further explore the capability of these models, the role of composition on each of the individual strengthening mechanisms was investigated for the commercial alloy RR1000. Composition was found to have a complex role on the yield strength due to the multifaceted effect of elemental phase partitioning. The methods described may be collectively used to refine alloy composition and microstructure for optimal strength. (C) 2019 The Authors. Published by Elsevier Ltd.

引用

页数：15

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