根据非标准样本评估添加剂制造IN 625的拉伸强度
Alexandru Paraschiv1, Gheorghe Matache1,2, Mihaela Raluca Condruz1
1Special Components for Gas Turbines Department, Romanian Research and Development Institute for Gas Turbines COMOTI, 220D Iuliu Maniu, 061126 Bucharest, Romania.
与标准样品相比,增材制造 (AMed) IN 625的小尺寸拉伸样本的强度较低,但柔性更好. 这些较小的标本适用于AMed IN 625零件的质量控制.
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:
- 像IN 625这样的基于的超级合金在苛刻的应用中至关重要.
- 增材制造 (AM) 提供复杂的几何形状,但需要量身定制的材料特征.
- 对于薄 AMed 组件,标准拉伸试验可能是不可行的.
研究的目的:
- 用小尺寸样本评估增材制造 (AMed) IN 625的拉伸性能.
- 为了比较小尺寸标本与标准标本的性能.
- 评估小尺寸标本是否适用于AMed IN 625的质量控制.
主要方法:
- 激光粉床融合 (LPBF) 用于制造IN 625圆柱形优惠券.
- 对制造的优惠券进行了热处理.
- 具有不同尺寸直径的小尺寸拉力样本在环境温度下经过加工和测试.
主要成果:
- 小尺寸的标本比标准标本具有较低的拉伸强度和承载强度.
- 小型标本的强度超过了AMed IN 625的ASTM最低要求.
- 骨折分析揭示了混合裂变和微凝聚,在小尺寸标本中增强了柔性.
结论:
- 观察到的"尺寸效应"会影响小尺寸标本的机械性能.
- 小型标本为AMed IN 625的质量控制和合规性验证提供了有价值的数据.
- 鉴定方法必须适应增材制造的零件的特定尺寸.
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