预热处理Al-Mg-Zn合金中双峰晶组织增强的强度-塑性协同效应

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-04-07 DOI:10.1016/j.matlet.2025.138545

Yang Huang , Wensheng Liu , Chuzhao Zhang , Mingdong Wu , Zeyu Li , Juan Wang , Baishan Chen , Daihong Xiao , Lanping Huang

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引用次数: 0

摘要

金属材料中的双峰结构被认为是一个很有前途的研究前沿。在本研究中，我们采用预热处理的方法，将双峰晶Al-5.10 Mg-3.09Zn-0.21Ag-0.13Zr-0.08Yb合金的抗拉强度提高了12%，达到543.7 MPa，而双峰结构使合金保持了大约90%的拉伸伸长率。性能的增强源于预时效过程中产生的高密度ginier - preston （GP）区和预应变过程中引入的大量位错，它们共同加速了t相时效硬化动力学。此外，双峰结构的粗晶组分增强了位错存储能力，从而减轻了通常与预应变过程相关的塑性损失。

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Enhanced strength-ductility synergy via bimodal-grained structure in a pre-thermomechanical treated Al-Mg-Zn alloy

Bimodal structures in metallic materials have been considered as promising research frontiers. In this study, we applied a pre-thermomechanical treatment that improved the tensile strength of a bimodal-grained Al-5.10 Mg-3.09Zn-0.21Ag-0.13Zr-0.08Yb alloy by 12 % to 543.7 MPa, while the bimodal structure enabled the alloy to retain approximately 90 % of tensile elongation. The enhanced performance originates from high-density Guinier-Preston (GP) zones generated during pre-aging and substantial dislocations introduced by pre-straining, which collectively accelerated T-phase age-hardening kinetics. Furthermore, the bimodal structure’s coarse grain components enhanced dislocation storage capacity, thereby alleviating plasticity loss that typically associated with pre-straining processes.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive