Understanding the creep property of heat-resistant Al alloy by analyzing eutectic phase/matrix interface structures

IF 8.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Letters Pub Date : 2022-10-26 DOI:10.1080/21663831.2022.2136016

Z. Bian, Chen Yang, Hongyi Zhu, Dechao Zhao, Mingliang Wang, Huawei Zhang, Zhe Chen, Haowei Wang

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引用次数: 4

Abstract

Interface characteristics are of great importance in mechanical performance for multi-phases heat-resistant Al alloys. Herein, Al3Sc precipitates were created at both Al/Al9FeNi interface and Al matrix inside Al–Fe-Ni eutectic alloy by microalloyed Sc. Critically, Al3Sc interface precipitates were found to alleviate local lattice distortion at the Al/Al9FeNi interface to improve interface stability. Therefore, this alloy showed superior creep properties over available reports. The underlying mechanisms were quantitatively elucidated by elevated load transfer effect from interface precipitates and enhanced threshold stress from matrix precipitates. Generally, this work provided a solid understanding to optimize the creep property of eutectic Al alloys by manipulating interface structures. GRAPHICAL ABSTRACT IMPACT STATEMENT This work reports that Al3Sc precipitates at Al/Al9FeNi interface can enhance load transfer effect of eutectic phase from microscopic/macroscopic factors, illustrating fundamental mechanisms for creep improvement of eutectic Al alloy.

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通过分析共晶相/基体界面结构了解耐热铝合金的蠕变性能

界面特性对多相耐热铝合金的力学性能具有重要影响。本文中，通过微合金化Sc，在Al/Al9FeNi界面和Al–Fe-Ni共晶合金内部的Al基体上都产生了Al3Sc沉淀。至关重要的是，发现Al3Sc界面沉淀可以减轻Al/Al9Fe Ni界面的局部晶格畸变，提高界面稳定性。因此，与现有报道相比，该合金显示出优异的蠕变性能。通过界面沉淀物的载荷传递效应增加和基体沉淀物的阈值应力增强，定量阐明了潜在的机制。总的来说，这项工作为通过操纵界面结构来优化共晶铝合金的蠕变性能提供了坚实的理解。图形摘要影响声明本工作报道了Al/Al9FeNi界面上的Al3Sc沉淀可以从微观/宏观因素增强共晶相的载荷传递效应，说明了改善共晶铝合金蠕变的基本机制。

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来源期刊

Materials Research Letters Materials Science-General Materials Science

CiteScore

12.10

自引率

3.60%

发文量

审稿时长

3.3 months

期刊介绍： Materials Research Letters is a high impact, open access journal that focuses on the engineering and technology of materials, materials physics and chemistry, and novel and emergent materials. It supports the materials research community by publishing original and compelling research work. The journal provides fast communications on cutting-edge materials research findings, with a primary focus on advanced metallic materials and physical metallurgy. It also considers other materials such as intermetallics, ceramics, and nanocomposites. Materials Research Letters publishes papers with significant breakthroughs in materials science, including research on unprecedented mechanical and functional properties, mechanisms for processing and formation of novel microstructures (including nanostructures, heterostructures, and hierarchical structures), and the mechanisms, physics, and chemistry responsible for the observed mechanical and functional behaviors of advanced materials. The journal accepts original research articles, original letters, perspective pieces presenting provocative and visionary opinions and views, and brief overviews of critical issues.