Detwinning/twin growth-induced phase transformation in a metastable compositionally complex alloy

IF 3.3 3区物理与天体物理 Q2 PHYSICS, CONDENSED MATTER

Superlattices and Microstructures Pub Date : 2022-01-01 DOI:10.20517/microstructures.2022.14

Wenjun Lu, F. An, C. Liebscher

引用次数: 1

Abstract

Extensive experiments have shown that the transformation from the face-centered cubic to hexagonal close-packed ε phase usually occurs around coherent Σ3 boundaries. However, in this letter, we reveal a different transformation mechanism in a metastable dual-phase compositionally complex alloy via a systematic high-resolution scanning transmission electron microscopy analysis. The face-centered cubic γ matrix can be transformed to the hexagonal close-packed ɛ phase (as small as one unit) around an incoherent Σ3 boundary (~30 nm), i.e., the facet of the coherent Σ3 boundary. This transformation is assisted by the detwinning/twin growth of a coherent Σ3 boundary during annealing treatment (900 °C for 60 min).

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亚稳复合合金的去孪晶/孪晶生长诱导相变

大量的实验表明，从面心立方到六边形密集ε相的转变通常发生在相干Σ3边界附近。然而，在这篇文章中，我们通过系统的高分辨率扫描透射电镜分析揭示了亚稳双相成分复杂合金的不同转变机制。面心立方γ矩阵可以在非相干Σ3边界(~30 nm)周围(即相干Σ3边界的面)转化为六角形密排相(小至一个单位)。在退火处理(900°C 60分钟)期间，相干Σ3边界的脱孪/孪晶生长辅助了这种转变。

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

Superlattices and Microstructures 物理-物理：凝聚态物理

CiteScore

6.10

自引率

3.20%

发文量

审稿时长

2.8 months

期刊介绍： Micro and Nanostructures is a journal disseminating the science and technology of micro-structures and nano-structures in materials and their devices, including individual and collective use of semiconductors, metals and insulators for the exploitation of their unique properties. The journal hosts papers dealing with fundamental and applied experimental research as well as theoretical studies. Fields of interest, including emerging ones, cover: • Novel micro and nanostructures • Nanomaterials (nanowires, nanodots, 2D materials ) and devices • Synthetic heterostructures • Plasmonics • Micro and nano-defects in materials (semiconductor, metal and insulators) • Surfaces and interfaces of thin films In addition to Research Papers, the journal aims at publishing Topical Reviews providing insights into rapidly evolving or more mature fields. Written by leading researchers in their respective fields, those articles are commissioned by the Editorial Board. Formerly known as Superlattices and Microstructures, with a 2021 IF of 3.22 and 2021 CiteScore of 5.4