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异物损伤对Inconel 718接接头的疲劳性能的影响

Peng Jia¹, Chen Han², Qun Li²

¹Tianjin Key Laboratory of Civil Aircraft Airworthiness and Maintenance, Civil Aviation University of China, Tianjin, 300300, China. pjia@cauc.edu.cn.

Scientific reports

|December 19, 2025

概括

在Inconel 718接接头 (WJ) 中,外体损伤 (FOD) 在低冲击能量下显示出比普通金属 (BM) 更高的疲劳寿命. 然而,高能量冲击会在WJ中造成内部损伤,显著降低其疲劳性能.

科学领域:

材料科学材料科学材料科学
机械工程机械工程
金工业是金工业的一个方面.

背景情况:

718是航空航天和能源领域的关键合金.
了解外来物体损伤 (FOD) 对结构完整性至关重要.
研究接接头 (WJ) 与普通金属 (BM) 的冲击行为是必不可少的.

研究的目的:

调查Inconel 718普通金属 (BM) 和接接头 (WJ) 中的异物损伤 (FOD).
分析撞击能量对损伤形态,微观结构和疲劳性能的影响.
为了比较BM和WJ的FOD阻力和疲劳行为.

主要方法:

吊撞击测试被用来模拟FOD.
对损伤形态进行了宏观和微观分析.
在不同的撞击条件下评估了疲劳性能.

主要成果:

接接头 (WJ) 的疲劳寿命和硬度比普通金属 (BM) 高,这是由于颗粒精炼和沉阶段.
损伤的尺寸随着撞击能量增加而增加,但在WJ比BM在等效能量水平较小.
显微损伤有所不同:BM在碳化物接口上显示了裂,而WJ在沉阶段显示了洞和微裂.
在低冲击能量下,WJ在疲劳寿命上胜过BM. 相反,高能量冲击导致WJ的内部损伤,大大减少了它们的疲劳寿命,低于BM的疲劳寿命.

结论:

718的微观结构显著影响其对外来物体损伤 (FOD) 的反应.
与普通金属 (BM) 相比,接接头 (WJ) 在低能耗冲击条件下提供优越的疲劳性能.
高能量冲击对Inconel 718接接头的完整性构成关键风险,需要仔细设计和运行考虑.

关键词:

这里是 FOD FOD FOD FOD.疲劳表现的表现疲劳表现的表现在Inconel 71818中使用.微观结构的微观结构在WJJ中,你会看到WJJ.

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