Scholarlink

<p>In this study, 7075 aluminum alloy was fabricated by hot-pressing process with various production temperatures and times. It was also aimed to reveal the effects of hot-pressing process parameters on microstructure, corrosion and wear properties of the 7075 aluminum. Samples were produced at 450&#xa0;°C, 475&#xa0;°C and 500&#xa0;°C with 30-min and 60-min process duration under 200&#xa0;MPa pressure and 0.1-bar vacuum. Microstructural analysis revealed that the magnesium- and zinc-containing secondary phases decomposed under the enhanced steady cooling conditions, which facilitated sufficient diffusion. It was observed that continuous grain boundary phases transformed into a discontinuous structure via the diffusion of magnesium with increasing process temperature. The corrosion behavior of the samples was dependent on the microstructure, and also the discontinuous morphology of the magnesium- and copper-rich secondary phases decreased the corrosion rate down to 0.1746&#xa0;mm/year. On the other hand, the formation of secondary phases negatively affected the wear resistance, and lower surface damage was obtained in samples produced at 450&#xa0;°C for 30&#xa0;minutes and 60&#xa0;minutes.</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

Hot-Pressing Process of 7075 Aluminum Alloy: Microstructure, Corrosion and Wear Properties

  • 期刊论文

  • 发表日期：

    2026年1月3日

查看全文
  • Umut Can Cingöz,
  • Zekeriya Yaşar Cömert,
  • Burçin Özbay Kısasöz,
  • Yahya Bayrak,
  • Raşit Sezer,
  • Alptekin Kısasöz

摘要

In this study, 7075 aluminum alloy was fabricated by hot-pressing process with various production temperatures and times. It was also aimed to reveal the effects of hot-pressing process parameters on microstructure, corrosion and wear properties of the 7075 aluminum. Samples were produced at 450 °C, 475 °C and 500 °C with 30-min and 60-min process duration under 200 MPa pressure and 0.1-bar vacuum. Microstructural analysis revealed that the magnesium- and zinc-containing secondary phases decomposed under the enhanced steady cooling conditions, which facilitated sufficient diffusion. It was observed that continuous grain boundary phases transformed into a discontinuous structure via the diffusion of magnesium with increasing process temperature. The corrosion behavior of the samples was dependent on the microstructure, and also the discontinuous morphology of the magnesium- and copper-rich secondary phases decreased the corrosion rate down to 0.1746 mm/year. On the other hand, the formation of secondary phases negatively affected the wear resistance, and lower surface damage was obtained in samples produced at 450 °C for 30 minutes and 60 minutes.