Enhancing adhesion and tribological properties of Al7075 via shot peening and physical vapor deposition techniques

IF 2 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS

Thin Solid Films Pub Date : 2026-03-01 Epub Date: 2026-02-14 DOI:10.1016/j.tsf.2026.140891

Behzad Ghasemi Parvin, Gokhan Gulten, Yasar Totik, Ihsan Efeoglu

{"title":"Enhancing adhesion and tribological properties of Al7075 via shot peening and physical vapor deposition techniques","authors":"Behzad Ghasemi Parvin, Gokhan Gulten, Yasar Totik, Ihsan Efeoglu","doi":"10.1016/j.tsf.2026.140891","DOIUrl":null,"url":null,"abstract":"<div><div>Al 7075 is a high-strength aluminum alloy widely used in aerospace and automotive applications; however, its surface hardness and wear resistance are limited. In this study, Al 7075 was shot peened using S110 and S230 shot types at Almen intensities of 8A and 10A, followed by TiN thin film deposition by physical vapor deposition (PVD). The coatings were produced under different target currents (2–3 A), N<sub>2</sub> flow rates (5–7 sccm), and duty cycles (15–30 %) based on a Taguchi L<sub>4</sub> design. Structural, mechanical, and tribological properties were evaluated using microscopy, microhardness, scratch, and pin-on-disk tests under dry sliding conditions. The combined treatment increased surface hardness from ∼178 Vickers microhardness (HV) to ∼832 HV (S230 shot and 10A with titanium nitride (TiN) coating) ≈395 %. Shot peening (SP) increased the surface roughness from approximately 4–5 µm to 9–12 µm, whereas subsequent TiN coating reduced the roughness to about 3–4 µm. Scratch test results revealed improved coating adhesion, with critical load values reaching up to 27 N. Among the investigated conditions, the combination of S230 shot type with 10 Almen intensity and optimized PVD parameters (R3) provided the most favorable balance between hardness, adhesion strength, and tribological performance, demonstrating the effectiveness of SP-assisted TiN coating for enhancing the surface durability of Al 7075.</div></div>","PeriodicalId":23182,"journal":{"name":"Thin Solid Films","volume":"837 ","pages":"Article 140891"},"PeriodicalIF":2.0000,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thin Solid Films","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0040609026000404","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/2/14 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"MATERIALS SCIENCE, COATINGS & FILMS","Score":null,"Total":0}

引用次数: 0

Abstract

Al 7075 is a high-strength aluminum alloy widely used in aerospace and automotive applications; however, its surface hardness and wear resistance are limited. In this study, Al 7075 was shot peened using S110 and S230 shot types at Almen intensities of 8A and 10A, followed by TiN thin film deposition by physical vapor deposition (PVD). The coatings were produced under different target currents (2–3 A), N₂ flow rates (5–7 sccm), and duty cycles (15–30 %) based on a Taguchi L₄ design. Structural, mechanical, and tribological properties were evaluated using microscopy, microhardness, scratch, and pin-on-disk tests under dry sliding conditions. The combined treatment increased surface hardness from ∼178 Vickers microhardness (HV) to ∼832 HV (S230 shot and 10A with titanium nitride (TiN) coating) ≈395 %. Shot peening (SP) increased the surface roughness from approximately 4–5 µm to 9–12 µm, whereas subsequent TiN coating reduced the roughness to about 3–4 µm. Scratch test results revealed improved coating adhesion, with critical load values reaching up to 27 N. Among the investigated conditions, the combination of S230 shot type with 10 Almen intensity and optimized PVD parameters (R3) provided the most favorable balance between hardness, adhesion strength, and tribological performance, demonstrating the effectiveness of SP-assisted TiN coating for enhancing the surface durability of Al 7075.

查看原文本刊更多论文

通过喷丸和物理气相沉积技术提高Al7075的附着力和摩擦学性能

Al 7075是一种高强度铝合金，广泛应用于航空航天和汽车领域；但其表面硬度和耐磨性有限。本研究采用S110和S230两种喷丸方式在8A和10A Almen强度下喷丸Al 7075，然后采用物理气相沉积（PVD）方法沉积TiN薄膜。基于Taguchi L4设计，在不同的目标电流（2-3 A）、N2流速（5-7 sccm）和占空比（15 - 30%）下制备了涂层。在干滑动条件下，使用显微镜、显微硬度、划痕和销盘测试来评估结构、机械和摩擦学性能。复合处理将表面硬度从~ 178维氏显微硬度（HV）提高到~ 832 HV （S230喷片和10A氮化钛（TiN）涂层）≈395%。喷丸处理（SP）将表面粗糙度从大约4-5µm提高到9-12µm，而随后的TiN涂层将粗糙度降低到大约3-4µm。划痕试验结果表明，涂层附着力得到改善，临界载荷值高达27 n。在所研究的条件中，10 Almen强度的S230喷丸类型和优化的PVD参数（R3）的组合在硬度、附着力和摩擦学性能之间取得了最有利的平衡，证明了sp辅助TiN涂层提高Al 7075表面耐久性的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Thin Solid Films 工程技术-材料科学：膜

CiteScore

4.00

自引率

4.80%

发文量

381

审稿时长

7.5 months

期刊介绍： Thin Solid Films is an international journal which serves scientists and engineers working in the fields of thin-film synthesis, characterization, and applications. The field of thin films, which can be defined as the confluence of materials science, surface science, and applied physics, has become an identifiable unified discipline of scientific endeavor.