Mechanical, corrosion and tribological behavior of friction stir processed AZ31B/egg shell /WS2 hybrid surface composite

IF 2.5 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications Pub Date : 2024-08-27 DOI:10.1177/14644207241277945

K Nehru, P Tamilselvam

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引用次数: 0

Abstract

In the present work, egg shell and Tungsten disulphide particles are reinforced in AZ31B alloy using friction stir process. Initially, the ES and WS2 particles are mixed at different weight ratios (25/75, 50/50 and 75/25) then are reinforced in AZ31B plates using a taper threaded FSP tool at rotation speed of 1000 rpm, axial load of 6 kN and traverse speed of 10 mm/min in hole method. The post macroscopic analysis showed that defect free hybrid surface composite is obtained with 75wt %ES and 25wt % WS2 particles reinforced in AZ31B alloy. The grain size is reduced from 15 µm to 5 µm due to the addition of 75wt% ES and 25wt% WS2 particles through FSP. The mechanical, corrosion and tribological responses of AZ31B/75ES/25WS2 hybrid surface composite are observed and are compared with FSPed AZ31B alloy without reinforcements and AZ31B base alloy. The microhardness is improved by 66% and 83% in FSPed AZ31B alloy and AZ31B/75ES/25WS2 hybrid surface composite respectively compared to the AZ31B base alloy. Similarly, the ultimate tensile strength is improved by 16% and 31% in FSPed AZ31B alloy and AZ31B/75ES/25WS2 hybrid surface composite respectively compared to the AZ31B base alloy but the % of elongation is decreased by 70% and 78% in FSPed AZ31B alloy and AZ31B/75ES/25WS2 hybrid surface composite respectively compared to the AZ31B base alloy. The corrosion rates of FSPed AZ31B alloy and AZ31B/75ES/25WS2 hybrid surface composite are decreased by 22% and 48% respectively compared to AZ31B base alloy. The dry sliding friction and wear responses are observed for AZ31B base alloy and AZ31B/75ES/25WS2 hybrid surface composite by varying the applied load (10 N, 20 N and 30 N) and sliding velocity (1.5 m/s, 2.6 m/s and 3.6 m/s) with constant sliding distance of 2000 m. In AZ31B base alloy, the wear mechanism is initially dominated by delamination and ploughing phenomena but at high sliding condition, the delaminated and worn out debris based tribolayer reduced the wear rate. In AZ31B/75ES/25WS2 hybrid surface composite, the wear mechanism is dominated by adhesive and delamination phenomena and the formed tribolayer decreased the wear rate at high sliding condition.

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摩擦搅拌加工的 AZ31B/蛋壳/WS2 混合表面复合材料的力学、腐蚀和摩擦学行为

在本研究中，使用搅拌摩擦工艺在 AZ31B 合金中强化了蛋壳和二硫化钨颗粒。首先，以不同的重量比（25/75、50/50 和 75/25）混合蛋壳和二硫化钨颗粒，然后使用锥形螺纹 FSP 工具，以 1000 rpm 的转速、6 kN 的轴向载荷和 10 mm/min 的横移速度在孔法中对 AZ31B 板进行增强。后宏观分析表明，在 AZ31B 合金中添加 75wt %ES 和 25wt % WS2 颗粒后，获得了无缺陷混合表面复合材料。由于通过 FSP 添加了 75wt % ES 和 25wt % WS2 颗粒，晶粒尺寸从 15 µm 减小到 5 µm。观察了 AZ31B/75ES/25WS2 混合表面复合材料的机械、腐蚀和摩擦学反应，并将其与不添加增强剂的 AZ31B 合金和 AZ31B 基础合金进行了比较。与 AZ31B 基合金相比，FSPed AZ31B 合金和 AZ31B/75ES/25WS2 混合表面复合材料的显微硬度分别提高了 66% 和 83%。同样，与 AZ31B 基合金相比，FSPed AZ31B 合金和 AZ31B/75ES/25WS2 混合表面复合材料的极限抗拉强度分别提高了 16% 和 31%，但与 AZ31B 基合金相比，FSPed AZ31B 合金和 AZ31B/75ES/25WS2 混合表面复合材料的伸长率分别降低了 70% 和 78%。与 AZ31B 基合金相比，FSPed AZ31B 合金和 AZ31B/75ES/25WS2 混合表面复合材料的腐蚀率分别降低了 22% 和 48%。通过改变施加载荷（10 N、20 N 和 30 N）和滑动速度（1.5 m/s、2.6 m/s 和 3.6 m/s），并保持 2000 m 的滑动距离，观察了 AZ31B 基合金和 AZ31B/75ES/25WS2 混合表面复合材料的干滑动摩擦和磨损响应。在 AZ31B/75ES/25WS2 混合表面复合材料中，磨损机理主要是粘合和分层现象，在高滑动条件下，形成的摩擦层降低了磨损率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 工程技术-材料科学：综合

CiteScore

4.70

自引率

8.30%

发文量

166

审稿时长

3 months

期刊介绍： The Journal of Materials: Design and Applications covers the usage and design of materials for application in an engineering context. The materials covered include metals, ceramics, and composites, as well as engineering polymers. "The Journal of Materials Design and Applications is dedicated to publishing papers of the highest quality, in a timely fashion, covering a variety of important areas in materials technology. The Journal''s publishers have a wealth of publishing expertise and ensure that authors are given exemplary service. Every attention is given to publishing the papers as quickly as possible. The Journal has an excellent international reputation, with a corresponding international Editorial Board from a large number of different materials areas and disciplines advising the Editor." Professor Bill Banks - University of Strathclyde, UK This journal is a member of the Committee on Publication Ethics (COPE).