Fatigue-induced microstructural deformation and multimode defect-assisted cracking of laser powder bed fused superalloy at 650 °C
文献类型：期刊论文
| 作者 | Sun, Chuanwen2; Li, Wei2; Serjouei, Ahmad1; Cao, Xiaobo2; Li C(李成)5; Sun, Rui4; Li, Xiaolong3 |
| 刊名 | INTERMETALLICS
 |
| 出版日期 | 2025-10-01 |
| 卷号 | 185页码:15 |
| 关键词 | Laser powder bed fusion Nickel-based superalloy Fatigue Microstructure Interior failure mechanisms |
| ISSN号 | 0966-9795 |
| DOI | 10.1016/j.intermet.2025.108907 |
| 通讯作者 | Li, Wei(lliw@bit.edu.cn) ; Serjouei, Ahmad(ahmad.serjouei@ntu.ac.uk) ; Sun, Rui(rsun@c-nin.com) |
| 英文摘要 | Multi-scale characterization was conducted to investigate the interior failure behavior of a laser powder bed fused (LPBF) nickel-based superalloy under fatigue cyclic loading at operating temperature of 650 degrees C. The results reveal a shift in crack nucleation sites with increasing fatigue life-from additive manufacturing defects to crystallographic facets. Six distinct interior fatigue failure modes were identified, each involving defect-assisted crack nucleation surrounded by faceted features. Microcracks preferentially propagated in a transgranular fracture mode under localized shear stress, leading to grain fracture and facet formation. Variations in grain orientation influenced local fracture behavior, resulting in the formation of highly uneven facets. Competition between surface, subsurface and interior crack nucleation modes was observed, particularly at lower stress levels, indicating a transition in dominant fatigue mechanisms. At elevated temperatures, facet cracking was driven by a synergistic mechanism involving anti-phase boundary shearing, precipitate bypassing, and stacking fault shearing. These findings advance the understanding of defect-microstructure interactions and provide a basis for improving fatigue life prediction and design strategies for high-temperature LPBF components. |
| 分类号 | 二类/Q1 |
| 资助项目 | National Natural Science Foundation of China[52175128] ; State Key Laboratory for Mechanical Behavior of Materials[20232501] ; Shaanxi Province Innovation Capability Support Plan[2024 ZG-GCZX-01- (1) -04] ; Qinchuangyuan Attracts High-level Innovation or Entrepreneurship Talent Project[QCYRCXM-2022-173] |
| WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001528588500001 |
| 资助机构 | National Natural Science Foundation of China ; State Key Laboratory for Mechanical Behavior of Materials ; Shaanxi Province Innovation Capability Support Plan ; Qinchuangyuan Attracts High-level Innovation or Entrepreneurship Talent Project |
| 其他责任者 | Li, Wei，Serjouei, Ahmad，Sun, Rui |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/102035]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.Nottingham Trent Univ, Sch Sci & Technol, Dept Engn, Nottingham NG11 8NS, England; 2.Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China; 3.East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China 4.Northwest Inst Nonferrous Met Res, Refractory Mat Res Cent, Xian 710016, 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,Serjouei, Ahmad,et al. Fatigue-induced microstructural deformation and multimode defect-assisted cracking of laser powder bed fused superalloy at 650 °C[J]. INTERMETALLICS,2025,185:15. |
| APA | Sun, Chuanwen.,Li, Wei.,Serjouei, Ahmad.,Cao, Xiaobo.,李成.,...&Li, Xiaolong.(2025).Fatigue-induced microstructural deformation and multimode defect-assisted cracking of laser powder bed fused superalloy at 650 °C.INTERMETALLICS,185,15. |
| MLA | Sun, Chuanwen,et al."Fatigue-induced microstructural deformation and multimode defect-assisted cracking of laser powder bed fused superalloy at 650 °C".INTERMETALLICS 185(2025):15. |
入库方式： OAI收割
来源：力学研究所
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