ABSTRACT

Machining superalloys through conventional methods is extremely difficult due to their inherent mechanical properties such as improved toughness, lower thermal conductivity, and strength-to-weight ratio. The paper deals with machining studies on Inconel 718, a nickel-based superalloy, through the plasma arc cutting (PAC) process. Response surface methodology -based Box–Behnken Design) approach was applied for developing and executing the PAC experiments. Statistical validation, parameter’s influence on the responses, and mathematical relations between the responses and parameters were investigated through multiparameter analysis of variance. Whale optimization algorithm was applied to perform the multiresponse optimization to identify the prime PAC parameters. The microstructure of cut surfaces was investigated through a scanning electron microscope to distinguish the cutting effects on substrate surface along with the several cutting conditions.

摘要

由于其固有的机械性能，如韧性提高、导热系数降低和强度重量比，通过传统方法加工超级合金极其困难。该论文涉及通过等离子弧切割 (PAC) 工艺对镍基高温合金 Inconel 718 进行加工研究。应用基于响应面方法的 Box–Behnken Design) 方法来开发和执行 PAC 实验。通过多参数方差分析研究了统计验证、参数对响应的影响以及响应与参数之间的数学关系。鲸鱼优化算法被应用于执行多响应优化以识别主要的PAC参数。