Purpose

The evaluation of novel materials such as the acrylonitrile styrene acrylate (ASA) for tribological and mechanical conditions can provide a structural protection against the environmental and wear effects that results in the long-term integrity of the 3 D printed parts. Results of the experimental stage are intended to identify the influence of the printing conditions on the functional characteristics of ASA parts that results in variations of the friction coefficient, wear rate and tensile response. In addition, this study aims to highlight the relevance of printing parameters to avoid the use of chemical post-processing stages, increasing the performance and sustainability of the process.

Design/methodology/approach

In this research, an evaluation of the influence of printing parameters of layer thickness and temperature on the mechanical and tribological response have been carried out for ASA specimens manufactured by fused filament fabrication technology. For this purpose, a range of three different values of thickness of fused layer and three different printing temperatures were combined in the manufacturing process of tests samples. Mechanical behavior of the printed parts was evaluated by standard tensile tests, and friction forces were measured by pin-on-disk tribological tests against steel spheres.

Findings

Higher layer thickness of the printed parts shows lower resistance to tribological wear effects; in terms of friction coefficient and wear rate, this type of parts also presents lower tensile strength. It has been detected that mechanical and tribological behavior is highly related to the micro-geometrical characteristics of the printed surfaces, which can be controlled by the manufacturing parameters. Under this consideration, a reduction in the coefficient of friction near to 65% in the average value was obtained through the variation of the layer thickness of printed surfaces.

Originality/value

This research aims to fill a gap in the scientific literature about the use of specific additive manufacturing materials under dynamic contact. This paper is mainly focused on the influence of the manufacturing parameters on the tribological and mechanical behavior of a weather resistant polymer (ASA).

中文翻译：

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对丙烯腈苯乙烯丙烯酸酯 (ASA) 增材制造部件的机械和摩擦学响应的打印策略设计的评估

目的

对诸如丙烯腈苯乙烯丙烯酸酯 (ASA) 等新材料的摩擦学和机械条件进行评估可以提供结构保护，防止环境和磨损影响，从而导致 3D 打印部件的长期完整性。实验阶段的结果旨在确定打印条件对 ASA 部件功能特性的影响，这些特性会导致摩擦系数、磨损率和拉伸响应的变化。此外，本研究旨在强调印刷参数的相关性，以避免使用化学后处理阶段，提高工艺的性能和可持续性。

设计/方法/方法

在这项研究中，对采用熔丝制造技术制造的 ASA 试样进行了层厚度和温度印刷参数对机械和摩擦学响应的影响的评估。为此，在测试样品的制造过程中结合了一系列三种不同的熔融层厚度值和三种不同的印刷温度。打印部件的机械性能通过标准拉伸测试进行评估，摩擦力通过针对钢球的销盘摩擦学测试进行测量。

发现

打印部件的层厚越高，对摩擦磨损效应的抵抗力就越低；在摩擦系数和磨损率方面，这类零件也呈现出较低的抗拉强度。已经检测到机械和摩擦学行为与打印表面的微观几何特征高度相关，可以通过制造参数进行控制。在这种考虑下，通过改变印刷表面的层厚，获得了平均接近 65% 的摩擦系数降低。

原创性/价值

这项研究旨在填补有关在动态接触下使用特定增材制造材料的科学文献中的空白。本文主要关注制造参数对耐候聚合物 (ASA) 摩擦学和机械性能的影响。