通过可控的双峰晶粒和位错活动具有优异强度-延展性协同作用的异质结构钛复合材料

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

Materials Research Letters Pub Date : 2023-09-05 DOI:10.1080/21663831.2023.2252858

Jiajing Chen, Yuanfei Han, Zichao Wei, Shaopeng Li, Zhonggang Sun, Liang Zhang, Guangfa Huang, Jianwen Le, Di Zhang, Weijie Lu

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引用次数: 0

摘要

在颗粒增强钛基复合材料(PRTMCs)中构建异质结构以避免强度-延性权衡困境比金属材料要困难得多。在这里，我们提出了一种新的和可控的简单粉末组装策略来制造双模晶prtmc，这种定制的策略使粗晶粒(CGs)被超细晶粒(UFG)矩阵包围，赋予传统的均匀材料无法实现的优越的强度-延展性组合。我们发现这种异质结构似乎促进了大部分位错在CG中的储存和在CG/UFG边界附近的积累。此外，混杂增强材料还激活了多种硬化机制，从而产生了高延性。本文提出了一种新的、可控的简单粉末组装方法来制备异质结构金属基复合材料，打破了强度-塑性权衡的困境，并揭示了位错活性的增强。

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Heterostructured titanium composites with superior strength-ductility synergy via controllable bimodal grains and dislocation activity

Constructing heterostructures in particulate reinforced titanium matrix composites (PRTMCs) to evade the strength-ductility trade-off dilemma is much more difficult than in metals. Here, we proposed a novel and controllable strategy of simple powder assembly to fabricate bimodal-grained PRTMCs, this customized strategy makes coarse grains (CGs) surrounded by ultrafine-grained (UFG) matrices, conferring a superior strength-ductility combination not achievable by their traditional homogeneous counterparts. We found that such heterostructures appear to promote storage of mostly dislocations in CGs and accumulation near the CG/UFG boundaries. Moreover, hybrid reinforcements also activate multiple hardening mechanisms, inducing high ductility. GRAPHICAL ABSTRACT IMPACT STATEMENT We proposed a novel and controllable strategy of simple powder assembly to fabricate heterostructured metal matrix composites for breaking the strength-ductility trade-off dilemma and revealed the enhanced dislocation activity.

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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.