改善了严重变形的ZM31合金的耐腐蚀性和机械性能
A I Alateyah1, Amal BaQais2, Mohamed M Z Ahmed3,4
1Department of Mechanical Engineering, College of Engineering, Qassim University, Unaizah, 56452, Saudi Arabia.
Heliyon
|February 23, 2024
概括
同等通道角压 (ECAP) 处理显著改进了-- (ZM31) 合金的微观结构. 这种颗粒精炼提高了机械性能和耐腐蚀性,增强了ZM31合金的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 腐蚀科学 腐蚀科学
背景情况:
- 合金具有理想的性能,但由于其六角密封 (HCP) 结构,其可塑性较差.
- Mg-Zn-Mn (ZM31) 合金在商业上具有吸引力,但需要改进机械和腐蚀行为.
研究的目的:
- 为了研究等通道角压缩 (ECAP) 对ZM31合金微观结构,纹理,机械和腐蚀性能的影响.
- 探索ECAP在提高ZM31合金在工业应用中的性能方面的潜力.
主要方法:
- 通过Bc路径使用等通道角压 (ECAP) 处理ZM31合金.
- 微结构分析,纹理评估,机械测试 (强度,硬度) 和在NaCl介质中测量腐蚀速率.
主要成果:
- 通过ECAP处理诱导了动态再结晶,导致了显著的粒度提炼 (平均粒度大小分别在2和4次通过后为2.2和2微米).
- 在产量强度 (132%) 和最终强度 (64%) 中观察到显著改善.
- 在四次ECAP通过后,NaCl介质中的腐蚀率减少了99.5%,这是由于增强的保护性氧化物层.
结论:
- ECAP是一种有效的方法,用于提炼ZM31合金的粒度结构.
- 取得的谷物精炼和相关的微观结构进化导致了优越的机械强度和增强的耐腐蚀性.
- 这项研究证明了ECAP加工ZM31合金在要求高性能的工业应用中的潜力.
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