| Defect-induced cracking and fine granular characteristics in very-high-cycle fatigue of laser powder bed fusion AlSi10Mg alloy | |
Li JH(李江华)1; Sun JY(孙经雨)1; Qian GA(钱桂安)1 ; Shi LT2,3
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| Corresponding Author | Sun, Jingyu([email protected]) ; Qian, Guian([email protected]) |
| Source Publication | INTERNATIONAL JOURNAL OF FATIGUE
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| 2022-05-01 | |
| Volume | 158Pages:14 |
| ISSN | 0142-1123 |
| Abstract | The evolution of defects during very-high-cycle fatigue (VHCF) is important for assessing the lifetime of AlSi10Mg alloy produced by laser powder bed fusion. In the study, VHCF experiments were carried out with an ultrasonic fatigue machine at a stress ratio of -1. Detailed characteristics of short cracks in VHCF were investigated by metallographic serial sections using scanning electron microscope and electron backscatter diffraction. Results show that the defects with nominal stress of 49-60 MPa have different degrees of cracking. As a result of the difference in defect shape, nominal stress and microstructure, fatigue cracks exhibit different cracking modes and propagation paths. Grain refinement behavior occurs at short cracks under VHCF, and the heterogeneous distribution of fine grains underneath the crack surfaces is strongly related to the as-printed microstructure and crack propagation path. Statistical analysis suggests that regardless of the crystal orientation, the misorientation between fine grains and matrix grains tends to be 40-50. The average crack growth rate in VHCF is approximately in the range of 10(-12 )~ 10(-10) m/Cycle. |
| Keyword | Laser powder bed fusion Very-high-cycle fatigue Defect-induced crack Grain refinement Misorientation |
| DOI | 10.1016/j.ijfatigue.2022.106770 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000792826400001 |
| WOS Keyword | FORMATION MECHANISM ; GROWTH ; INITIATION ; MICROSTRUCTURE ; BEHAVIOR ; THERMOGRAPHY ; PLASTICITY ; TI-6AL-4V ; DAMAGE ; STEEL |
| WOS Research Area | Engineering ; Materials Science |
| WOS Subject | Engineering, Mechanical ; Materials Science, Multidisciplinary |
| Funding Project | National Natural Science Foundation of China[11872364] ; National Natural Science Foundation of China[12002185] ; National Natural Science Foundation of China[11932020] ; National Natural Science Foundation of China[12072345] ; CAS Pioneer Hundred Talents Program |
| Funding Organization | National Natural Science Foundation of China ; CAS Pioneer Hundred Talents Program |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Sun, Jingyu ; Qian, Guian |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/89334 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China; 2.China Automot Technol & Res Ctr Co Ltd, 68 East Xianfeng Rd, Tianjin 300300, Peoples R China; 3.Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China |
| Recommended Citation GB/T 7714 | Li JH,Sun JY,Qian GA,et al. Defect-induced cracking and fine granular characteristics in very-high-cycle fatigue of laser powder bed fusion AlSi10Mg alloy[J]. INTERNATIONAL JOURNAL OF FATIGUE,2022,158:14.Rp_Au:Sun, Jingyu, Qian, Guian |
| APA | 李江华,孙经雨,钱桂安,&Shi LT.(2022).Defect-induced cracking and fine granular characteristics in very-high-cycle fatigue of laser powder bed fusion AlSi10Mg alloy.INTERNATIONAL JOURNAL OF FATIGUE,158,14. |
| MLA | 李江华,et al."Defect-induced cracking and fine granular characteristics in very-high-cycle fatigue of laser powder bed fusion AlSi10Mg alloy".INTERNATIONAL JOURNAL OF FATIGUE 158(2022):14. |
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