Dual role of trace elements in magnesium dissolved age hardened A356 alloy on microstructure and peak micro hardness

IF 1.9 Q3 ENGINEERING, MANUFACTURING

Manufacturing Review Pub Date : 2023-01-01 DOI:10.1051/mfreview/2023003

Kashimata Nithesh, R. Nayak, Rajarama Hande, Sathyashankara Sharma, Mandya Channegowda Gowri Shankar, Srinivas Doddapaneni

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引用次数: 1

Abstract

The present work reflects the effects of trace addition of copper (up to 1 wt.%) and zinc (0.5 wt.%) on the microstructure and hardness property of heat treated A356 (Al-7Si) alloy. Small amount of zinc and copper was introduced into A356 in both atomic form (alloy) and powder form (composite) and its age hardening behaviour were investigated. To enhance the wettability during composite fabrication and solid solution strengthening in alloys, a small quantity of magnesium (1 wt.%) was added. The main objective of this study is to introduce lower melting point zinc reinforcement into A356 matrix alloy by copper coating of zinc particles and then reinforcing it into A356 matrix. All stir cast specimens were subjected to T6 treatment by solutionizing at 520 °C for 2 h followed by 60 °C water quench and then aging at 100 and 200 °C to determine peak hardness value. Microstructure analysis showed that a minimum 1 wt.% copper was required to form Al2Cu intermetallic phase during solidification resulting in finer grain structure with hardness improvement. Under as-cast conditions, a maximum hardness of 85 VHN was obtained in 1 wt.% copper reinforced composite. Under peak aged conditions, aging at 100 °C showed 116% hardness improvement in 1 wt.% Cu reinforced composite.

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镁溶时效硬化A356合金中微量元素对显微组织和峰值显微硬度的双重作用

本工作反映了微量添加铜(最多1 wt.%)和锌(0.5 wt.%)对热处理A356 (Al-7Si)合金显微组织和硬度性能的影响。将少量锌和铜分别以原子态(合金)和粉末态(复合)的形式加入A356中，研究其时效硬化行为。为了提高复合材料的润湿性和合金的固溶体强化，加入少量的镁(1 wt.%)。本研究的主要目的是通过铜包覆锌颗粒，将低熔点锌增强到A356基体中，然后将其强化到A356基体中。所有搅拌铸造试样进行T6处理，520℃固溶2 h, 60℃水淬，然后在100℃和200℃时效，以确定峰值硬度值。显微结构分析表明，最小1 wt。在凝固过程中，需要%的铜形成Al2Cu金属间相，从而使晶粒更细，硬度提高。在铸态条件下，在1 wt中获得了85 VHN的最大硬度。%铜增强复合材料。在峰值时效条件下，在100°C时效下，硬度提高了116%。% Cu增强复合材料。

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

Manufacturing Review ENGINEERING, MANUFACTURING-

CiteScore

5.40

自引率

12.00%

发文量

审稿时长

8 weeks

期刊介绍： The aim of the journal is to stimulate and record an international forum for disseminating knowledge on the advances, developments and applications of manufacturing engineering, technology and applied sciences with a focus on critical reviews of developments in manufacturing and emerging trends in this field. The journal intends to establish a specific focus on reviews of developments of key core topics and on the emerging technologies concerning manufacturing engineering, technology and applied sciences, the aim of which is to provide readers with rapid and easy access to definitive and authoritative knowledge and research-backed opinions on future developments. The scope includes, but is not limited to critical reviews and outstanding original research papers on the advances, developments and applications of: Materials for advanced manufacturing (Metals, Polymers, Glass, Ceramics, Composites, Nano-materials, etc.) and recycling, Material processing methods and technology (Machining, Forming/Shaping, Casting, Powder Metallurgy, Laser technology, Joining, etc.), Additive/rapid manufacturing methods and technology, Tooling and surface-engineering technology (fabrication, coating, heat treatment, etc.), Micro-manufacturing methods and technology, Nano-manufacturing methods and technology, Advanced metrology, instrumentation, quality assurance, testing and inspection, Mechatronics for manufacturing automation, Manufacturing machinery and manufacturing systems, Process chain integration and manufacturing platforms, Sustainable manufacturing and Life-cycle analysis, Industry case studies involving applications of the state-of-the-art manufacturing methods, technology and systems. Content will include invited reviews, original research articles, and invited special topic contributions.