A Comparative Study on the Effect of Potassium on Grain Refinement and Wear Performance of A319 Aluminum Alloy

IF 2.3 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

JOM Pub Date : 2025-07-15 DOI:10.1007/s11837-025-07597-4

Mostafa Karamouz, Seyed Mohammad Jesmani, Majid Bagheri

{"title":"A Comparative Study on the Effect of Potassium on Grain Refinement and Wear Performance of A319 Aluminum Alloy","authors":"Mostafa Karamouz, Seyed Mohammad Jesmani, Majid Bagheri","doi":"10.1007/s11837-025-07597-4","DOIUrl":null,"url":null,"abstract":"<div><p>The influence of potassium (K) addition on the structure, hardness and wear characteristics of A319 aluminum alloy was examined. Various amounts of potassium (0, 0.03, 0.06 and 0.09 wt.%) were added to the A319 melt, and the evolution of the microstructure was studied by both optical and scanning electron microscopy. In addition, mechanical properties were assessed through hardness testing and pin-on-disc wear experiments. The results showed that K addition led to substantial grain refinement and altered the eutectic silicon morphology from a coarse, plate-like structure to a fine, interconnected form. The best grain refinement and wear resistance were observed at 0.06 wt.% K, which exhibited the highest hardness value (72 VHN) and the lowest wear rate (37 µg/m). However, increasing the K content to 0.09 wt.% caused porosity formation, reducing the hardness and wear resistance of the alloy. These results prove the importance of controlling the K concentration to achieve optimal microstructure and wear properties in A319 alloys.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 10","pages":"7684 - 7695"},"PeriodicalIF":2.3000,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"JOM","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11837-025-07597-4","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

The influence of potassium (K) addition on the structure, hardness and wear characteristics of A319 aluminum alloy was examined. Various amounts of potassium (0, 0.03, 0.06 and 0.09 wt.%) were added to the A319 melt, and the evolution of the microstructure was studied by both optical and scanning electron microscopy. In addition, mechanical properties were assessed through hardness testing and pin-on-disc wear experiments. The results showed that K addition led to substantial grain refinement and altered the eutectic silicon morphology from a coarse, plate-like structure to a fine, interconnected form. The best grain refinement and wear resistance were observed at 0.06 wt.% K, which exhibited the highest hardness value (72 VHN) and the lowest wear rate (37 µg/m). However, increasing the K content to 0.09 wt.% caused porosity formation, reducing the hardness and wear resistance of the alloy. These results prove the importance of controlling the K concentration to achieve optimal microstructure and wear properties in A319 alloys.

查看原文本刊更多论文

钾对A319铝合金晶粒细化及磨损性能影响的对比研究

研究了钾(K)的加入对A319铝合金组织、硬度和磨损性能的影响。在A319熔体中加入不同量的钾（0、0.03、0.06和0.09 wt.%），通过光学显微镜和扫描电镜研究了其微观组织的演变。此外，通过硬度测试和销盘磨损试验对其力学性能进行了评估。结果表明，K的加入导致晶粒细化，并使共晶硅的形貌从粗糙的片状结构转变为精细的互连结构。在0.06 wt.% K时，晶粒细化和耐磨性最佳，硬度值最高（72 VHN），磨损率最低（37µg/m）。然而，当K含量增加到0.09 wt.%时，会产生孔隙，使合金的硬度和耐磨性降低。这些结果证明了控制K浓度对A319合金获得最佳组织和磨损性能的重要性。

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

JOM 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.80%

发文量

540

审稿时长

2.8 months

期刊介绍： JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.