研究低成本Ti-2Fe-0.1B合金的超塑性变形行为
Yaoyao Mi1, Yu Lu1, Delong Wang1
1College of Materials Science and Engineering, Tech Institute for Advanced Materials, Nanjing Tech University, Nanjing 211816, China.
Materials (Basel, Switzerland)
|March 28, 2024
概括
这项研究表明,低成本的Ti-2Fe-0.1B合金在低至550°C的温度和高拉伸率下表现出极好的超塑性. 合金实现了显著的延长,突出了其用于先进制造工艺的潜力.
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.
- 机械工程 机械工程
背景情况:
- 合金具有高强度和耐腐蚀性,但机械加工能力差.
- 超塑性成型是合金的发展技术,特别是在较低的温度和较高的拉伸率下.
- 研究用于超塑性应用的具有成本效益的合金对于工业采用至关重要.
研究的目的:
- 为了评估一个低成本的Ti-2Fe-0.1B合金的超塑性形成能力.
- 确定在这种合金中实现高延长的最佳条件.
- 了解控制这种合金中的超塑性微观结构机制.
主要方法:
- 在550~750°C的温度范围内对Ti-2Fe-0.1B合金进行拉伸测试.
- 在1 × 10-3 s-1到1 × 10-2 s-1的应变速率下进行测试.
- 微观结构分析,观察变形机制.
主要成果:
- 这种合金在550°C时表现出良好的超塑性,高拉伸率为1×10−2s−1,延长率为137.5%.
- 在750°C和1×10−3s−1的应变速率下,获得了最大452%的延长和高应变速率灵敏度 (m=0.3).
- 微结构观测显示了加速的再结晶和谷物边界滑动,受Fe和TiB阶段的影响.
结论:
- 低成本的Ti-2Fe-0.1B合金在各种条件下表现出显著的超塑性潜力.
- 铁和TiB相的存在在增强超塑性变形机制,如动态再结晶和球化等方面发挥着关键作用.
- 这种合金是需要超塑性成型的工业应用的有希望的候选者.
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