具有粗晶粒和超细晶粒的 AlMgZnCuAg 交叉合金中的沉淀行为

IF 8.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Letters Pub Date : 2023-11-15 DOI:10.1080/21663831.2023.2281589

P. D. Willenshofer, M. A. Tunes, C. Kainz, O. Renk, T. Kremmer, S. Gneiger, P. Uggowitzer, S. Pogatscher

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引用次数: 0

摘要

交叉铝合金是最近推出的一类新型粗晶粒时效硬化合金。在这里，我们研究了具有粗细和超细微观结构的 5xxx/7xxx 交叉合金中 T 相沉淀的演变过程。这两种合金均采用差示扫描量热法、X 射线衍射法和原位透射电子显微镜进行检测。由于晶界是快速扩散通道，超细晶粒合金显示出明显不同的加速析出行为。此外，超细晶粒合金在加热时具有很强的抗晶粒长大能力，这种效应主要归因于晶粒间析出与 T 相的跨晶粒析出的协同作用。图表说明影响声明研究了粗晶粒和超细晶粒对新型铝交叉合金中 T 相析出行为的影响。通过控制 T 相沉淀实现了超细晶粒的热稳定性。

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Precipitation behaviour in AlMgZnCuAg crossover alloy with coarse and ultrafine grains

Crossover aluminium alloys have recently been introduced as a new class of coarse-grained age-hardenable alloys. Here, we study the evolution of precipitation of the T-phase — -phase — in a 5xxx/7xxx crossover alloy with coarse- and ultrafined microstructures. Both alloys were examined using differential scanning calorimetry, X-ray diffraction and in situ transmission electron microscopy. The ultrafine-grained alloy revealed significant different and accelerated precipitation behaviour due to grain boundaries acting as fast diffusion paths. Additionally, the ultrafine-grained alloy revealed high resistance to grain growth upon heating, an effect primarily attributed to inter-granular precipitation synergistically with trans-granular precipitation of T-phase. GRAPHICAL ABSTRACT IMPACT STATEMENT The effect of coarse and ultrafine grains on the T-phase precipitation behaviour in novel aluminium crossover alloys was investigated. Thermal stability of ultrafine grains was achieved through controlled T-phase precipitation.

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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.