对各种内在缺陷标准进行比较,以在增材制造的AlSi10Mg中绘制Kitagawa-Takahashi图形
Mohammed Intishar Nur1, Meetkumar Soni1, Mustafa Awd1
1Chair of Materials Test Engineering (WPT), Faculty of Mechanical Engineering, TU Dortmund University, Baroper Str. 303, D-44227 Dortmund, Germany.
Materials (Basel, Switzerland)
|September 28, 2023
概括
内部缺陷显著降低了选择性激光化 (SLM) 组件的疲劳寿命. 这项研究开发了通过分析增材制造的AlSi10Mg标本中缺陷特征来预测疲劳寿命的方法.
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:
- 选择性激光化 (SLM) 是一种用于金属粉末的增材制造技术.
- SLM部件的内部缺陷可能会损害机械性能,特别是疲劳寿命.
- 预测增材制造组件的疲劳寿命需要了解缺陷行为.
研究的目的:
- 调查内部缺陷对SLM处理的AlSi10Mg标本疲劳寿命的影响.
- 根据缺陷特征开发和验证预测疲劳寿命的方法.
- 为了提高增材制造部件疲劳寿命预测模型的准确性.
主要方法:
- 在各种负载条件下进行疲劳和拉伸性测试.
- 扫描电子显微镜 (SEM) 用于缺陷表征.
- 用于计算应力强度因子的有限元分析 (FEA).
- 开发了Kitagawa-Takahashi和El-Haddad图的发展.
- 适用巴黎法来确定疲劳寿命.
主要成果:
- 建立了内部缺陷大小和减少疲劳寿命之间的相关性.
- 经验证的疲劳寿命预测与实验数据对比.
- 开发了一个校正因子假设来解释数据偏差.
- 确定了影响疲劳性能的关键缺陷参数.
结论:
- 内部缺陷严重影响SLM AlSi10Mg标本的疲劳寿命.
- 开发的方法为增材制造中改善疲劳寿命预测提供了基础.
- 选择适当的内在裂标准对于准确的预测至关重要.
关键词:
在 AlSi10Mgg 中.图加瓦 塔卡哈希 图加瓦 塔卡哈希巴黎法律法则 巴黎法律法添加剂制造 添加剂制造 添加剂制造疲劳寿命预测 疲劳寿命预测有限元素模拟的模拟器.内部缺陷 内部缺陷选择性的激光化.压力强度因子是压力强度因子.更多相关视频
12:18Co-localizing Kelvin Probe Force Microscopy with Other Microscopies and Spectroscopies: Selected Applications in Corrosion Characterization of Alloys
Published on: June 27, 2022
2.7K
07:15A Novel Method for In Situ Electromechanical Characterization of Nanoscale Specimens
Published on: June 2, 2017
9.3K
相关概念视频
01:10Stress-Strain Diagram
681
A stress-strain diagram is a crucial tool that graphically displays a material's mechanical characteristics. This diagram is derived from a tensile test performed on a carefully prepared cylindrical specimen. The specimen has two gauge marks inscribed on its central part, and the distance between these marks is known as the gauge length. The cylindrical specimen is placed in a testing machine, which applies an increasing centric load. As this load grows, so does the gauge length. This...
681
01:24Stress-Strain Diagram - Ductile Materials
813
The stress-strain relationship in ductile materials such as structural steel or aluminium is intricate and progresses through several stages. When a specimen is loaded, it initially exhibits a linear length increase, depicted by a steep straight line on the stress-strain diagram. It indicates the material is elastically deforming and will return to its original shape once unloaded. However, when a critical stress value is reached, plastic deformation begins. This stage sees substantial...
813