Ismail Asmawi, Othman Nurul Husna, Mustapha Mazli, Mohamed Saheed Mohamed Shuaib, Abdullah Zaki, Muhammed Musa, Mohamed Saat Asmalina, Mustapha Faizal
Department of Mechanical Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Malaysia.
Department of Maritime Engineering Technology (MET), Malaysian Institute of Marine Engineering Technology, Universiti Kuala Lumpur, Lumut 32200, Malaysia.
Materials (Basel). 2022 Sep 13;15(18):6331. doi: 10.3390/ma15186331.
This article investigated the mechanical performance and corrosion behaviour of a diffusion-bonded A5083 aluminium/A36 mild steel dissimilar joint with a Gallium (Ga) interlayer. The bonding parameters were the bonding temperature (525 and 550 °C), holding time (60 and 120 min) and surface roughness (800 and 1200 grit). Property characterisation was achieved using Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX) analysis, Vickers microhardness tester, Izod impact tester and potentiodynamic polarisation testing. The results revealed that the significance of the bonding parameters was in the order bonding temperature > surface roughness > holding time. Increasing the bonding temperature resulted in an increase in the impact strength and a corresponding reduction in the corrosion rate and microhardness. However, increasing the grit size decreased the microhardness and a corresponding increase in the impact strength and corrosion rate. The impact strength and corrosion rate decreased with the increasing holding time while the microhardness followed a reverse trend. It was also discovered that incorporating the Ga interlayer resulted in a 67.9% improvement in the degradation rate.
本文研究了一种带有镓（Ga）中间层的扩散连接A5083铝/A36低碳钢异种接头的力学性能和腐蚀行为。连接参数包括连接温度（525和550°C）、保温时间（60和120分钟）以及表面粗糙度（800和1200目）。使用扫描电子显微镜（SEM）、能量色散X射线（EDX）分析、维氏显微硬度测试仪、艾氏冲击试验机和动电位极化测试进行性能表征。结果表明，连接参数的重要性顺序为连接温度>表面粗糙度>保温时间。提高连接温度会导致冲击强度增加，同时腐蚀速率和显微硬度相应降低。然而，增大砂纸粒度会降低显微硬度，同时冲击强度和腐蚀速率相应增加。冲击强度和腐蚀速率随保温时间的增加而降低，而显微硬度则呈相反趋势。还发现加入Ga中间层使降解速率提高了67.9%。
