Scholarlink

<p>Despite AZ91 alloy being a notable Mg alloy because of its castability and favorable mechanical properties, its limited corrosion and wear resistance restrict its applications. This study is to evaluate AZ91 alloyed with 0.5, 1.0, and 2.0 wt.% Bismuth (Bi) to enhance its wear and corrosion resistance, for the first time. The addition of Bi up to 1.0 wt.% resulted in a finer and more uniform distribution of β within the matrix, as well as grain refinement, higher solid solubility of alloy elements and secondary phase strength. The incorporation of Bi did not significantly influence the friction coefficient or wear mechanism, yet it enhanced the wear rate by 34% at 1.0 wt.% Bi. The electrochemical corrosion characteristics of the alloys were examined through tests conducted in a 0.1&#xa0;M NaCl solution. The findings indicate that the microstructural alterations induced by the incorporation of Bi substantially influenced the corrosion resistance of the AZ91 alloy, with optimal composition observed at 1.0 wt.% Bi. It was also found that pitting corrosion was effective in all but the alloy containing 2.0 wt.% Bi. The study demonstrates that Bi-added AZ91alloy is suitable for applications in automotive, sports, particularly load-bearing components where specific strength is critical.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Enhancing Wear and Corrosion Resistance of AZ91 Alloy by Bismuth Alloying

  • 期刊论文

  • 发表日期：

    2025年11月17日

查看全文
  • Eray Abakay

摘要

Despite AZ91 alloy being a notable Mg alloy because of its castability and favorable mechanical properties, its limited corrosion and wear resistance restrict its applications. This study is to evaluate AZ91 alloyed with 0.5, 1.0, and 2.0 wt.% Bismuth (Bi) to enhance its wear and corrosion resistance, for the first time. The addition of Bi up to 1.0 wt.% resulted in a finer and more uniform distribution of β within the matrix, as well as grain refinement, higher solid solubility of alloy elements and secondary phase strength. The incorporation of Bi did not significantly influence the friction coefficient or wear mechanism, yet it enhanced the wear rate by 34% at 1.0 wt.% Bi. The electrochemical corrosion characteristics of the alloys were examined through tests conducted in a 0.1 M NaCl solution. The findings indicate that the microstructural alterations induced by the incorporation of Bi substantially influenced the corrosion resistance of the AZ91 alloy, with optimal composition observed at 1.0 wt.% Bi. It was also found that pitting corrosion was effective in all but the alloy containing 2.0 wt.% Bi. The study demonstrates that Bi-added AZ91alloy is suitable for applications in automotive, sports, particularly load-bearing components where specific strength is critical.