Akhtar Maaz, Samiuddin Muhammad, Muzamil Muhammad, Siddiqui Muhammad Ali, Khan Rashid, Alsaleh Naser A, Siddiqui Ali Khursheed, Djuansjah Joy, Majeed Arfan
Mechanical and Industrial Engineering Department, College of Engineering, Imam Mohammad Ibn Saud Islamic University, Riyadh 11432, Saudi Arabia.
Metallurgical Engineering Department, NED University of Engineering & Technology, Karachi 75270, Sindh, Pakistan.
Materials (Basel). 2024 Apr 24;17(9):1959. doi: 10.3390/ma17091959.
A promising method for additive manufacturing that makes it possible to produce intricate and personalized parts is selective laser melting (SLM). However, the mechanical properties of as-corroded SLM parts are still areas of concern. This research investigates the mechanical behavior of SLM parts that are exposed to a saline environment containing a 3.5% NaCl solution for varying lengths of time. The exposure times chosen for this study were 10 days, 20 days, and 30 days. The results reveal that the tensile strength of the parts is significantly affected by the duration of exposure. Additionally, the study also examined the influence of porosity on the corrosion behavior of the parts. The analysis included studying the mass loss of the parts over time, and a regression analysis was conducted to analyze the relationship between exposure time and mass loss. In addition, the utilization of scanning electron microscopy (SEM) and X-ray photo spectroscopy (XPS) techniques yielded valuable insights into the fundamental mechanisms accountable for the observed corrosion and mechanical behavior. It was found that the presence of corrosion products (i.e., oxide layer) and pitting contributed to the degradation of the SLM parts in the saline environment. This research emphasizes the importance of considering part thickness in the design of SLM components for corrosive environments and provides insights for enhancing their performance and durability.
选择性激光熔化（SLM）是一种很有前景的增材制造方法，它能够制造复杂且个性化的零件。然而，经腐蚀后的SLM零件的机械性能仍是人们关注的领域。本研究调查了暴露于含有3.5%氯化钠溶液的盐环境中不同时长的SLM零件的力学行为。本研究选择的暴露时间为10天、20天和30天。结果表明，零件的拉伸强度受暴露时长的显著影响。此外，该研究还考察了孔隙率对零件腐蚀行为的影响。分析包括研究零件随时间的质量损失，并进行回归分析以分析暴露时间与质量损失之间的关系。此外，扫描电子显微镜（SEM）和X射线光电子能谱（XPS）技术的应用为解释观察到的腐蚀和力学行为的基本机制提供了有价值的见解。研究发现，腐蚀产物（即氧化层）的存在和点蚀导致了盐环境中SLM零件的降解。本研究强调了在设计用于腐蚀性环境的SLM部件时考虑零件厚度的重要性，并为提高其性能和耐久性提供了见解。
