3D打印的Ti-6Al-4V合金在冷变形过程中的行为特征
Tin Brlić1, Stoja Rešković1, Sonja Kraljević Šimunković2
1Faculty of Metallurgy, University of Zagreb, Aleja Narodnih Heroja 3, 44000 Sisak, Croatia.
Materials (Basel, Switzerland)
|May 7, 2025
概括
本研究描述了使用直接金属激光烧结3D打印Ti-6Al-4V合金的变形. 同时进行静态拉力测试,温度测试和数字图像相关测试,揭示了断裂前的温度振荡和局部应变.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 添加剂制造 添加剂制造 添加剂制造
背景情况:
- 增材制造 (AM) 可以实现复杂的几何形状,但了解Ti-6Al-4V等AM材料的机械行为至关重要.
- 在各种条件下对3D打印金属的变形进行表征对于可靠的应用是必不可少的.
研究的目的:
- 描述3D打印Ti-6Al-4V合金的弹性和塑性变形行为.
- 为了研究变形过程中的温度,应变和应变速率分布.
- 评估组合测试方法对分析变形局部化的有效性.
主要方法:
- 直接金属激光烧结 (DMLS) 用于生产Ti-6Al-4V试样.
- 采用了同时进行静态拉力测试,温度计和数字图像相关性 (DIC).
- 分析的重点在于冷变形期间的室温变形区域.
主要成果:
- 在弹性和塑性变形过程中观察到周期性的温度振荡.
- 热弹性效应导致在弹性变形过程中温度下降-0.47°C至-0.54°C.
- 显著的应变和应变速率定位发生在样本断裂前,最大应变为0.078-0.080和应变速率为0.025-0.027s-1.1.
结论:
- 静态拉力测试,温度测试和DIC对于定位3D打印Ti-6Al-4V中的应力,应变和应变速率是有效的.
- 这项研究提供了对DMLS处理的Ti-6Al-4V.的变形机制的见解.
- 了解这些行为对于优化AM流程和材料性能至关重要.
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