Abstract TiAlN is one of the most widely used physical vapour deposition (PVD) coatings in the manufacturing industry. Naturally, the performance of this coating is dependent on its properties, which can be tuned and optimized according to the application. Residual stress is one of the properties which affects hardness, fracture toughness, and adhesion of the coating. Although it is difficult to make a general recommendation for desirable residual stress values, individual recommendations can be made based on a specific workpiece material and tool wear mechanism. In this regard, adhesion wear and the formation of built-up edge were identified as the dominant wear mechanism during dry turning of compacted graphite iron and a coating's residual stress should be adjusted to minimize the damage from adhesion wear. Therefore, the present work investigates cutting performance and related coating properties of multilayer thick TiAlN coatings with different residual stress designs. For this purpose, residual stress was adjusted by varying the substrate bias voltage during the deposition process. The effect of residual stress on properties such as hardness, yield strength, and adhesion were studied by nanoindentation and scratch tests. Moreover, the dominant wear pattern, especially on the rake face and cutting edge, was thoroughly studied using a scanning electron microscope (SEM). The results showed increased mechanical properties such as hardness and yield strength with higher substrate bias voltages and therefore higher residual stresses. However, the coating with the lowest compressive residual stress outperformed the other coatings during machining due to a combination of high adhesion to the substrate and low as-deposited defects which effectively delayed cutting-edge exposure.

中文翻译：

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残余应力对蠕墨铸铁干车削过程中厚TiAlN多层涂层性能的影响

摘要 TiAlN 是制造业中应用最广泛的物理气相沉积 (PVD) 涂层之一。当然，这种涂层的性能取决于其特性，可以根据应用进行调整和优化。残余应力是影响涂层硬度、断裂韧性和附着力的特性之一。虽然很难对理想的残余应力值做出一般性建议，但可以根据特定的工件材料和刀具磨损机制提出个别建议。在这方面，粘着磨损和积屑瘤的形成被认为是蠕墨铸铁干车削过程中的主要磨损机制，应调整涂层的残余应力，以尽量减少粘着磨损造成的损害。所以，目前的工作研究了具有不同残余应力设计的多层厚 TiAlN 涂层的切削性能和相关涂层性能。为此，通过在沉积过程中改变衬底偏置电压来调整残余应力。通过纳米压痕和划痕试验研究了残余应力对硬度、屈服强度和附着力等性能的影响。此外，使用扫描电子显微镜 (SEM) 彻底研究了主要磨损模式，尤其是在前刀面和切削刃上。结果表明机械性能如硬度和屈服强度随着衬底偏置电压的升高而增加，因此残余应力也更高。然而，