Scholarlink

<p>In the present study, the weldments were fabricated via friction stir welding (FSW). The dissimilar matrix metals of AA 7075 (T651) and AA 6061 (T6) with nanohexagonal boron nitride (h-BN) as reinforcement were the working materials considered. The joints were distinguished in terms of varied volume fraction (3, 5 and 7%), number of passes (1, 2 and 3), change in advancing and retreating side and change in rolling direction of grains. The mechanical properties (ultimate tensile strength, elongation and microhardness), average grain size and microstructure of the prepared composite joints were analyzed. The joint with a 5% volume fraction showed a 3.76% higher strength than the 3% volume fraction joint and was 1.61% stronger than the joint with a 7% volume fraction. The weldment with 5% volume fraction, 2 pass and change in rolling direction of grains substantially showed enhanced mechanical properties. The h-BN reinforced welds pose higher level in terms of hardness than unreinforced due to reduced grain size and the presence of hard ceramic nanoparticles. Finally, h-BN as nanoparticles during FSW was responsible for the possibility of effective grain refining and microstructural properties as a result of dynamic recrystallization around the nugget zone.</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

Effect of h-BN Additions during Friction Stir Welding of Dissimilar Aluminum Alloys

  • 期刊论文

  • 发表日期：

    2026年5月11日

查看全文
  • M. Madhusudan,
  • S. P. Shanmuganatan,
  • K. Venkateswarlu,
  • M. S. Srinath,
  • Vijayakumar N. Patil,
  • Nitish Kumar

摘要

In the present study, the weldments were fabricated via friction stir welding (FSW). The dissimilar matrix metals of AA 7075 (T651) and AA 6061 (T6) with nanohexagonal boron nitride (h-BN) as reinforcement were the working materials considered. The joints were distinguished in terms of varied volume fraction (3, 5 and 7%), number of passes (1, 2 and 3), change in advancing and retreating side and change in rolling direction of grains. The mechanical properties (ultimate tensile strength, elongation and microhardness), average grain size and microstructure of the prepared composite joints were analyzed. The joint with a 5% volume fraction showed a 3.76% higher strength than the 3% volume fraction joint and was 1.61% stronger than the joint with a 7% volume fraction. The weldment with 5% volume fraction, 2 pass and change in rolling direction of grains substantially showed enhanced mechanical properties. The h-BN reinforced welds pose higher level in terms of hardness than unreinforced due to reduced grain size and the presence of hard ceramic nanoparticles. Finally, h-BN as nanoparticles during FSW was responsible for the possibility of effective grain refining and microstructural properties as a result of dynamic recrystallization around the nugget zone.