A Study of Strengthening and Hardening Micro-mechanisms in Additively Built AlSi10Mg Using Crystal Plasticity Simulations

IF 4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals and Materials International Pub Date : 2025-03-17 DOI:10.1007/s12540-025-01931-w

Manoj Singh Bisht, Vidit Gaur, I. V. Singh

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Abstract

The Al-Si cellular microstructure in additively manufactured AlSi10Mg plays a pivotal role in dictating its mechanical properties, such as strength and work-hardening. However, the micro-mechanism leading to the inter-relationship between the mechanical properties and microstructure is not yet well understood. Therefore, this investigation explores the processing-structure-property correlation in AlSi10Mg using a realistic 3D microstructure-based crystal plasticity (CP) approach. The work hardening in AlSi10Mg has been explored based on two mechanisms: (i) load bearing by the Si-phase and (ii) dislocation-driven hardening. The strain incompatibility introduced by the harder Si-phase generates geometrically necessary dislocations, which influence the hardening behavior. The role of the slip system interaction based on the slip activity on all active slip planes was also explored in understanding the work hardening behavior. The transformation in silicon morphology after the heat-treatment changes the interaction of dominant slip systems, thus leading to higher work hardening in the as-built condition during tensile deformation. The result of this study predicts that the tailoring of the Al-Si cellular structure can help to achieve the desired mechanical properties in the additively manufactured AlSi10Mg.

Graphic Abstract

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基于晶体塑性模拟的增材AlSi10Mg强化硬化微观机制研究

在增材制造的AlSi10Mg中，Al-Si细胞微观结构对其力学性能（如强度和加工硬化）起着关键作用。然而，导致力学性能与微观组织之间相互关系的微观机制尚不清楚。因此，本研究采用一种真实的基于三维微结构的晶体塑性（CP）方法探讨了AlSi10Mg的加工-结构-性能相关性。AlSi10Mg合金的加工硬化主要基于两种机制：(i) si相的载荷作用和（ii）位错驱动硬化。由较硬的si相引入的应变不相容会产生几何上必需的位错，从而影响硬化行为。基于所有活动滑移面的滑移活度，探讨了滑移系统相互作用在理解加工硬化行为中的作用。热处理后硅形态的转变改变了主要滑移体系的相互作用，从而导致拉伸变形时在原有条件下的高加工硬化。本研究的结果预测，铝硅细胞结构的定制可以帮助实现增材制造的AlSi10Mg所需的力学性能。图形抽象

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

Metals and Materials International 工程技术-材料科学：综合

CiteScore

7.10

自引率

8.60%

发文量

197

审稿时长

3.7 months

期刊介绍： Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.