Deformation mechanisms in the directionally solidified nickel-based CM247LC at room temperature

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Philosophical Magazine Letters Pub Date : 2022-03-17 DOI:10.1080/09500839.2022.2049908

Zhenhuan Gao, Peng Zhang, Q. Niu, Jiao Li, L. Nie, X. Gong, Xiaolong Song

引用次数: 1

Abstract

ABSTRACT After solutionizing and aging at 980°C for various durations, the compressive deformation behaviour and mechanisms of the directionally solidified nickel-based superalloy CM247LC are investigated at room temperature. Experimental results show that the yield strength decreases gradually from 991 ± 1.2–672 ± 7.5 MPa with increasing the γ′ precipitate size from 145 ± 2–604 ± 19 nm. Transmission electron microscope observations on the slightly deformed specimens reveal that, in contrast to previous researches, plastic deformation of all the specimens is controlled by strongly coupled dislocations cutting through γ′ precipitates. Based on these experimental results, the relationship between the yield strength and precipitate size is discussed.

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室温定向凝固镍基CM247LC的变形机理

摘要研究了定向凝固镍基高温合金CM247LC在980°C不同时间的固溶和时效后的室温压缩变形行为和机理。实验结果表明，屈服强度从991开始逐渐降低 ± 1.2–672 ± 7.5 MPa，随着γ′沉淀尺寸从145增加 ± 2–604 ± 19 nm。对轻微变形试样的透射电镜观察表明，与以往的研究相比，所有试样的塑性变形都是由切割γ′析出相的强耦合位错控制的。基于这些实验结果，讨论了屈服强度与沉淀物尺寸之间的关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Philosophical Magazine Letters 物理-物理：凝聚态物理

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

2.7 months

期刊介绍： Philosophical Magazine Letters is the rapid communications part of the highly respected Philosophical Magazine, which was first published in 1798. Its Editors consider for publication short and timely contributions in the field of condensed matter describing original results, theories and concepts relating to the structure and properties of crystalline materials, ceramics, polymers, glasses, amorphous films, composites and soft matter. Articles emphasizing experimental, theoretical and modelling studies on solids, especially those that interpret behaviour on a microscopic, atomic or electronic scale, are particularly appropriate. Manuscripts are considered on the strict condition that they have been submitted only to Philosophical Magazine Letters , that they have not been published already, and that they are not under consideration for publication elsewhere.