从局域应力<strong>/</strong>应变视角理解异构金属材料的强韧化行为

doi:10.11900/0412.1961.2022.00317

金属学报

2022, Vol. 58

Issue (11): 1427-1440 DOI: 10.11900/0412.1961.2022.00317

综述

本期目录 | 过刊浏览

从局域应力/应变视角理解异构金属材料的强韧化行为

范国华¹, 缪克松¹(

), 李丹阳², 夏夷平³, 吴昊¹

^1.南京工业大学先进轻质高性能材料研究中心南京 211816
^2.哈尔滨工业大学空间环境与物质科学研究院哈尔滨 150001
^3.哈尔滨工业大学材料科学与工程学院哈尔滨 150001

Unraveling the Strength-Ductility Synergy of Heterostructured Metallic Materials from the Perspective of Local Stress/Strain

FAN Guohua¹, MIAO Kesong¹(

), LI Danyang², XIA Yiping³, WU Hao¹

^1.Key Laboratory for Light-weight Materials, ‎Nanjing Tech University, Nanjing 211816, China
^2.Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, Harbin 150001, China
^3.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

引用本文:

范国华, 缪克松, 李丹阳, 夏夷平, 吴昊. 从局域应力/应变视角理解异构金属材料的强韧化行为[J]. 金属学报, 2022, 58(11): 1427-1440.
Guohua FAN, Kesong MIAO, Danyang LI, Yiping XIA, Hao WU. Unraveling the Strength-Ductility Synergy of Heterostructured Metallic Materials from the Perspective of Local Stress/Strain[J]. Acta Metall Sin, 2022, 58(11): 1427-1440.

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摘要:

同步提升强度与塑性是金属材料研究的不懈追求之一。近年来,异构设计通过调控力学性质存在显著差异的组元相的空间分布,突破了金属材料强度与塑性难兼得的瓶颈。异构变形诱导强化、应变分配、延迟颈缩、界面影响区等主流理论为异构金属材料设计提供了有力指导,上述理论均指出,在受载过程中,异构金属材料组元相的局域应力与局域应变存在独特特征,并伴随偏离经典理论预测的变形和断裂行为。本文综述了异构金属材料在早期变形阶段、塑性变形阶段和断裂阶段中局域应力和局域应变演化,归纳了异构金属材料中变形行为、断裂行为与局域应力、局域应变的交互关系及对力学性能的影响,为高性能异构金属材料的设计和研发提供新的思路。

关键词 ：异构设计, 局域应力, 局域应变, 变形行为, 断裂行为

Abstract：

The concurrent enhancement of strength and ductility is an unremitting pursuit in metallic material research. Recently, by deliberately controlling the spatial distribution of domains with substantially different mechanical properties, heterostructured architecture has overcome the limitation of strength-ductility synergy in metallic materials. Mainstream theories, such as hetero-deformation-induced hardening, strain partition, premature local necking delay, and interface affected zone, have provided crucial guidance for the designing of preferable heterostructured metallic materials. These theories suggest that the domains of heterostructured metallic materials present unique local stress and strain characteristics upon loading, accompanying deformation and fracture behaviors that deviate from the predictions of classical theories. In this study, the evolutions of local stress and strain during the early deformation, plastic deformation, and fracture stages of heterostructured metallic materials were reviewed. Moreover, interactions between deformation or fracture behaviors and local stress or strain as well as their effects on mechanical properties are summarized, presenting a new perspective for designing and developing high-performance heterostructured metallic materials.

Key words： heterostructured architecture local stress local strain deformation behavior fracture behavior

收稿日期: 2022-06-27

ZTFLH:

TB31

基金资助:国家重点研发计划项目(2020YFA0405900);国家自然科学基金项目(51927801);国家自然科学基金项目(52171117);江苏省自然科学基金项目(BK20202010);江苏省高等学校基础科学研究项目(22KJB430027)

作者简介: 范国华,男,1981年生,教授,博士

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https://www.ams.org.cn/CN/10.11900/0412.1961.2022.00317 或 https://www.ams.org.cn/CN/Y2022/V58/I11/1427

图1 几种典型的异构设计策略及其强韧化效果[15,16,19]

图2 异构金属材料的多个变形阶段[9,24]

图3 异构金属材料的强化机制[9]

图4 粗/细晶层状异构纯Ti板的晶格应变演化[40]

图5 具有3D界面的Cu/Nb层状异构材料的组织表征与力学性能[42,43]

图6 利用同步辐射X射线白光Laue微衍射技术分析Al/Al层状异构材料中的变形机制[15]

图7 梯度异构实现剪切带的非局域化[58,59]

图8 自然界中异构案例及应用[68,71,73,74]

图9 TiBw/Ti-Ti(Al)层状异构材料的断裂行为研究[14]

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