Evolution behavior of competing fatigue failure and life prediction related to defect, stress and temperature for laser powder bed fused superalloy with solution aging treatment
文献类型：期刊论文
| 作者 | Sun, Chuanwen1; Li, Wei1; Liu, Gang2; Sun, Rui3; Wang, Chuanpeng4; Li, Cheng5; Mahmood, Asif1; Hu, Zifan1 |
| 刊名 | INTERNATIONAL JOURNAL OF FATIGUE
 |
| 出版日期 | 2025-09-01 |
| 卷号 | 198页码:17 |
| 关键词 | Laser powder bed fusion Nickel-based superalloy Elevated temperature fatigue Internal failure evolution Life prediction |
| ISSN号 | 0142-1123 |
| DOI | 10.1016/j.ijfatigue.2025.109029 |
| 通讯作者 | Li, Wei(lliw@bit.edu.cn) ; Wang, Chuanpeng(wt009106@163.com) |
| 英文摘要 | Laser powder bed fusion (LPBF) provides advanced manufacturing capabilities for nickel-based superalloy, and solution aging treatment enhances its mechanical properties. However, the fatigue properties of solution-aged LPBF nickel-based superalloy at elevated temperature are not fully well understood. Here, high-cycle and very-high-cycle fatigue tests are conducted at 650 degrees C with stress ratios of R = -1 and 0.1. Microstructures and fatigue fractures are analyzed using various techniques, including scanning electron microscopy, X-ray computed tomography, electron backscatter diffraction, and three-dimensional ultra-depth of field imaging. The results indicate that solution aging blurs the laser tracks and melt pool prevalent in the LPBF process. The synergistic interaction of delta, gamma ', and gamma '' phases improves fatigue properties. Four defect-induced internal failure modes caused by facet, pore, lack of fusion, and inclusion are revealed. Internal microcracks grow in a trans-granular fracture mode under shear forces. The aggregation of facets formed during crack growth is a typical feature of internal failure. Interestingly, even for internal failures, the crack nucleation site gradually shifts from the subsurface to the center as the stress level decreases, accompanied by an increase in the facetted cracking area. A fatigue life prediction model related to the effects of defect features, stress, and temperature is established. |
| WOS关键词 | MICRO-DEFECT ; HIGH-CYCLE ; STEEL ; RATIO |
| 资助项目 | National Natural Science Foundation of China[52175128] ; State Key Laboratory for Mechanical Behavior of Materials[20232501] |
| WOS研究方向 | Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001487059300001 |
| 资助机构 | National Natural Science Foundation of China ; State Key Laboratory for Mechanical Behavior of Materials |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/101573]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 通讯作者 | Li, Wei; Wang, Chuanpeng |
| 作者单位 | 1.Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China 2.Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China 3.Northwest Inst Nonferrous Met Res, Refractory Mat Res Cent, Xian 710016, Peoples R China 4.China Inst Marine Technol & Econ, Beijing 100081, Peoples R China 5.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Chuanwen,Li, Wei,Liu, Gang,et al. Evolution behavior of competing fatigue failure and life prediction related to defect, stress and temperature for laser powder bed fused superalloy with solution aging treatment[J]. INTERNATIONAL JOURNAL OF FATIGUE,2025,198:17. |
| APA | Sun, Chuanwen.,Li, Wei.,Liu, Gang.,Sun, Rui.,Wang, Chuanpeng.,...&Hu, Zifan.(2025).Evolution behavior of competing fatigue failure and life prediction related to defect, stress and temperature for laser powder bed fused superalloy with solution aging treatment.INTERNATIONAL JOURNAL OF FATIGUE,198,17. |
| MLA | Sun, Chuanwen,et al."Evolution behavior of competing fatigue failure and life prediction related to defect, stress and temperature for laser powder bed fused superalloy with solution aging treatment".INTERNATIONAL JOURNAL OF FATIGUE 198(2025):17. |
入库方式： OAI收割
来源：力学研究所
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