A unified phonon-softening-based model to uncover processing history dependent strain hardening in metallic solids

IF 4.3 3区工程技术 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Extreme Mechanics Letters Pub Date : 2025-02-28 DOI:10.1016/j.eml.2025.102310

Jinguo Lin , Li Yu , Cen Chen , Tzu-Chiang Wang , Feng Liu

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Abstract

Recent years, microstructures are taken advantage to promote the improvement of both strength and ductility in metallic solids, or in other words to tailor the strain hardening behavior. Despite complicacy of microstructures, following the same processing protocol, it could guide as-cast samples all the way to the target structure and properties, which suggests that establishing a processing history dependent strain hardening model could be a way out for a better behavior description or even performance prediction. Based on a nonlinear transformation to strain, the common regularity of the processing history influence to metallic solids’ strain hardening behavior is uncovered, which helps us to model the processing history dependent strain hardening and its validity is confirmed by comparing with eighteen experimental data sets (66 stress-strain curves). Our theoretical model enables quantitatively describing the processing history dependence of strain hardening and even could be possibly used to characterize processing methods, which may provide insights into the strategy of evading strength–ductility trade-off.

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基于声子软化的统一模型揭示金属固体中与加工历史相关的应变硬化

近年来，人们利用微观组织来促进金属固体的强度和延展性的提高，或者换句话说，来定制应变硬化行为。尽管微观组织复杂，但遵循相同的加工方案，它可以引导铸态样品一路达到目标组织和性能，这表明建立一个依赖于加工历史的应变硬化模型可能是更好的行为描述甚至性能预测的途径。基于对应变的非线性转换，揭示了加工历史对金属固体应变硬化行为影响的共同规律，有助于建立加工历史相关应变硬化模型，并通过18组实验数据（66条应力-应变曲线）的对比验证了该模型的有效性。我们的理论模型能够定量描述应变硬化的加工历史依赖性，甚至可能用于表征加工方法，这可能为避免强度-塑性权衡的策略提供见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Extreme Mechanics Letters Engineering-Mechanics of Materials

CiteScore

9.20

自引率

4.30%

发文量

179

审稿时长

45 days

期刊介绍： Extreme Mechanics Letters (EML) enables rapid communication of research that highlights the role of mechanics in multi-disciplinary areas across materials science, physics, chemistry, biology, medicine and engineering. Emphasis is on the impact, depth and originality of new concepts, methods and observations at the forefront of applied sciences.