Altharan Yahya M, Shamsudin S, Al-Alimi Sami, Saif Yazid, Zhou Wenbin
Sustainable Manufacturing and Recycling Technology, Advanced Manufacturing and Materials Center (SMART-AMMC), Universiti Tun Hussein Onn Malaysia, Parit Raja, 86400, Malaysia.
Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400, Parit Raja, Batu Pahat, Johor, Malaysia.
Heliyon. 2024 Jul 14;10(14):e34433. doi: 10.1016/j.heliyon.2024.e34433. eCollection 2024 Jul 30.
The increasing demand for sustainable manufacturing has revived the interest in solid-state recycling (SSR) as a promising alternative method for aluminum waste. In this context, chips generated during machining processes constitute a substantial portion of aluminum waste, offering significant potential for recycling and mitigating waste. However, the machining chip morphology significantly impacts the properties of chip-based recycled parts. This review paper examines the current state-of-the-art solid-state recycling methods, focusing on hot forging, extrusion, equal channel angular pressing, friction stir extrusion and field-assisted sintering. It investigates the impact of aluminum chip morphology on the properties of the directly recycled material, emphasizing the chip machining consequence on the final quality of the product. Several studies reported that the strain and operating temperature are the most influential factors in SSR processes, followed by chip size with an average length of less than 4 mm. Yet, the heating time up to 3 h also had a major impact on chip weld strength. The findings highlighted the significance of aluminum chip morphology in improving the quality of recycled material. The properties of direct recycled samples primarily depend on chip weld strength and microstructure. Overall, this study presented a comprehensive overview of the current state of solid-state recycling and emphasized the significance of chip morphology in advancing the recycling process. Consequently, it equips researchers with a valuable resource for developing effective strategies for sustainable recycling of aluminum chips with high quality.
对可持续制造日益增长的需求，使人们对固态回收（SSR）重新产生了兴趣，将其作为一种处理铝废料的有前景的替代方法。在此背景下，加工过程中产生的切屑占铝废料的很大一部分，具有显著的回收和减少废料的潜力。然而，加工切屑的形态对基于切屑的回收零件的性能有显著影响。这篇综述文章研究了当前最先进的固态回收方法，重点关注热锻、挤压、等径角挤压、摩擦搅拌挤压和场辅助烧结。文章探讨了铝切屑形态对直接回收材料性能的影响，强调了切屑加工对产品最终质量的影响。多项研究表明，应变和操作温度是固态回收过程中最具影响力的因素，其次是平均长度小于4毫米的切屑尺寸。然而，长达3小时的加热时间对切屑焊接强度也有重大影响。研究结果突出了铝切屑形态对提高回收材料质量的重要性。直接回收样品的性能主要取决于切屑焊接强度和微观结构。总体而言，本研究全面概述了固态回收的现状，并强调了切屑形态在推进回收过程中的重要性。因此，它为研究人员提供了宝贵的资源，有助于制定高质量可持续回收铝切屑的有效策略。
