富硅/铝球磨LM6半固态铸造合金抗拉强度与显微组织性能的关系

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Philosophical Magazine Letters Pub Date : 2021-10-11 DOI:10.1080/09500839.2021.1986644

M. Agarwal, R. Srivastava

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引用次数: 1

摘要

摘要:本实验研究了采用半固液合金化工艺，用Si/Al粉末颗粒球磨改性富硅LM6铸造合金的效果。通过对合金的拉伸性能和断口表面的显微组织进行分析。拉伸实验结果表明，添加10% (R = 0.1)和25% (R = 0.25)的增强颗粒能改善铸态材料的拉伸性能。在断口表面发现了加工和富硅颗粒的共同作用。结果还表明，当R = 0.1时试样的拉应力和杨氏模量较高，而当R = 0.25时试样的应变较高。根据显微组织和EDX观察，提出了拉伸断裂、颗粒断裂和界面断裂的机理和模型。

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Correlation between tensile strength and microstructural properties of LM6 semi-solid cast alloy ball-milled with Si-rich/Al powder

ABSTRACT This experimental study deals with the effect of modifying an Si-rich LM6 cast alloy by ball milling with Si/Al powder particulates in which alloying was conducted via semi-solid liquid processing. The cast alloys were analyzed via their tensile properties with a microstructural evaluation of their fractured surfaces. The tensile results reveal the influence of ball-milled Si-rich powdery chips on the cast materials and demonstrate an improvement in tensile properties for 10% (R = 0.1) and 25% (R = 0.25) addition of reinforcement particulates. The combined effect of processing and the presence of Si-rich particulates is identified on the fractured surfaces. The results also show that higher values of tensile stress and Young’s modulus are obtained for the R = 0.1 samples but that the strain was higher for the R = 0.25 samples. A mechanism and model for the tensile fracture, and particle and interface cracking are proposed according to microstructure and EDX observations.

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来源期刊

Philosophical Magazine Letters 物理-物理：凝聚态物理

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

2.7 months

期刊介绍： Philosophical Magazine Letters is the rapid communications part of the highly respected Philosophical Magazine, which was first published in 1798. Its Editors consider for publication short and timely contributions in the field of condensed matter describing original results, theories and concepts relating to the structure and properties of crystalline materials, ceramics, polymers, glasses, amorphous films, composites and soft matter. Articles emphasizing experimental, theoretical and modelling studies on solids, especially those that interpret behaviour on a microscopic, atomic or electronic scale, are particularly appropriate. Manuscripts are considered on the strict condition that they have been submitted only to Philosophical Magazine Letters , that they have not been published already, and that they are not under consideration for publication elsewhere.