Comments on 'Selective evolution of secondary γ′ precipitation in a Ni-based single crystal superalloy both in the γ matrix and at the dislocation nodes'

被引：10

作者：

Cormier, Jonathan ^{[1
]}

Caccuri, Vincenzo ^{[1
]}

le Graverend, Jean-Briac ^{[2
]}

Villechaise, Patrick ^{[1
]}

机构：

[1] Univ Poitiers, Inst Pprime, UPR CNRS 3346, CNRS,ENSMA,Phys & Mech Mat Dept,ISAE ENSMA, 1 Ave Clement Ader,BP 40109, F-86961 Futuroscope, Chasseneuil, France

[2] Texas A&M Univ, Dept Aerosp Engn, College Stn, TX 77843 USA

来源：

SCRIPTA MATERIALIA | 2017年 / 129卷

关键词：

Ni-based single crystal superalloys; Creep; Hyperfine gamma ' precipitation; HIGH-TEMPERATURE CREEP; NICKEL-BASED SUPERALLOYS; INTERFACIAL DISLOCATIONS; NONISOTHERMAL CONDITIONS; COOLING PRECIPITATION; BEHAVIOR; DISSOLUTION; PHASE; MC2; MECHANISMS;

D O I：

10.1016/j.scriptamat.2016.10.012

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In a recent paper, Sisi Xiang & al. [Acta Materialia 116 (2016) 343] studied microstructure evolutions of gamma' precipitates during creep of a Ni-based single crystal superalloy, with a special focus on hyperfine gamma' particles nucleating in the gamma matrix channels. This paper is misleading, claiming that hyperfine gamma' particles nucleate during high temperature creep exposure at 1100 degrees C. The aim of the present comments is to reconsider these results based on the available literature on hyperfine gamma' particles nucleation mechanisms and subsequent morphological evolutions at high temperature. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：100 / 103

页数：4

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