In-situ TEM investigation of the effect of nano twins on the evolution of He bubbles under thermo-mechanical coupling conditions

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Scripta Materialia Pub Date : 2024-10-30 DOI:10.1016/j.scriptamat.2024.116431

Chengpeng Liu, Xiang-Xi Ye, Hefei Huang

引用次数: 0

Abstract

In this study, the in-situ TEM tensile experiment was performed on the Nb-modified GH3535 alloy after He ion irradiation at 750 °C, to investigate the influence of the nano twins on the evolution of irradiation-induced He bubbles under thermo-mechanical coupling conditions. The results suggest that the interaction between the He bubbles and nano twins may contribute to the abnormal irradiation hardening observed in Nb-GH3535 alloy, in addition to the effects of the He bubbles and precipitate strengthening. Moreover, the merger and coarsening of the He bubbles under the influence of the nano twins provide direct experimental evidence supporting the previously proposed stress-assisted coarsening mechanism for the He bubbles.

Abstract Image

查看原文本刊更多论文

纳米孪晶对热机械耦合条件下 He 气泡演化影响的原位 TEM 研究

本研究对 750 ℃ He 离子辐照后的 Nb 改性 GH3535 合金进行了原位 TEM 拉伸实验，以研究纳米孪晶在热机械耦合条件下对辐照诱导 He 气泡演化的影响。结果表明，除了氦气泡和沉淀强化的影响之外，氦气泡和纳米孪晶之间的相互作用也可能导致在 Nb-GH3535 合金中观察到的异常辐照硬化。此外，氦泡在纳米孪晶影响下的合并和粗化为之前提出的氦泡应力辅助粗化机制提供了直接的实验证据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Scripta Materialia 工程技术-材料科学：综合

CiteScore

11.40

自引率

5.00%

发文量

581

审稿时长

34 days

期刊介绍： Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.