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Fatigue and Fracture of Additively Manufactured Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Materials Characterization".

Deadline for manuscript submissions: closed (20 June 2022) | Viewed by 4188

Special Issue Editors


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Guest Editor
State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China
Interests: in situ fatigue tests; fracture mechanics; fatigue crack growth model; fatigue life prediction; finite element simulation; structural integrity of railway vehicle; additive manufacturing; correlative 4D tomography
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing, China
Interests: fracture; ultra-high-cycle fatigue; additive manufacturing alloys
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue focuses on Fatigue and Fracture of Additively Manufactured Materials that can bring together scientists and engineers working in the advanced manufacturing community to openly discuss the state-of-the-art, particularly with potential fatigue and/or fracture responses. It is well-known that such high-freedom fabricated advanced materials and components are necessarily obliged to key large-scale engineering complex structures subjected to complex environment and loading. This topic has been becoming a foundation of technical concern when pushing (hybrid) additive manufacturing processes into load-carrying structures. The depth understanding on damage evolution and modeling can help to qualify safety critical parts and further reduce the uncertainty of the physical system. Therefore, this Special Issue intends to collect contributions that address research studies related to theoretical, numerical and experimental investigations on the fatigue and fracture of advanced materials and structures using additive manufacturing. The Special Issue includes, but is not limited to, the following topics:

  1. Fatigue crack initiation and propagation from defects;
  2. Low- and high-cycle fatigue performance;
  3. Modeling process-microstructure-property-performance;
  4. Damage tolerance approach based on long cracks;
  5. Uncertainty analysis due to defects, roughness and residual stress;
  6. Machine-learned health prognosis and in situ monitoring;
  7. Stepwise fatigue assessment framework.

Prof. Dr. Shengchuan Wu
Prof. Dr. Guian Qian
Guest Editors

Manuscript Submission Information

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Keywords

  • additive manufacturing
  • fatigue life prediction
  • x-ray computed tomography
  • fatigue crack growth
  • defects and roughness
  • residual stress
  • finite element simulation
  • machine learning
  • fatigue assessment diagram

Published Papers (1 paper)

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Research

16 pages, 6061 KiB  
Article
Very-High-Cycle Fatigue Behavior of Inconel 718 Alloy Fabricated by Selective Laser Melting at Elevated Temperature
by Zongxian Song, Wenbin Gao, Dongpo Wang, Zhisheng Wu, Meifang Yan, Liye Huang and Xueli Zhang
Materials 2021, 14(4), 1001; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14041001 - 20 Feb 2021
Cited by 22 | Viewed by 3554
Abstract
This study investigates the very-high-cycle fatigue (VHCF) behavior at elevated temperature (650 °C) of the Inconel 718 alloy fabricated by selective laser melting (SLM). The results are compared with those of the wrought alloy. Large columnar grain with a cellular structure in the [...] Read more.
This study investigates the very-high-cycle fatigue (VHCF) behavior at elevated temperature (650 °C) of the Inconel 718 alloy fabricated by selective laser melting (SLM). The results are compared with those of the wrought alloy. Large columnar grain with a cellular structure in the grain interior and Laves/δ phases precipitated along the grain boundaries were exhibited in the SLM alloy, while fine equiaxed grains were present in the wrought alloy. The elevated temperature had a minor effect on the fatigue resistance in the regime below 108 cycles for the SLM alloy but significantly reduced the fatigue strength in the VHCF regime above 108 cycles. Both the SLM and wrought specimens exhibited similar fatigue resistance in the fatigue life regime of fewer than 107–108 cycles at elevated temperature, and the surface initiation mechanism was dominant in both alloys. In a VHCF regime above 107–108 cycles at elevated temperature, the wrought material exhibited slightly better fatigue resistance than the SLM alloy. All fatigue cracks are initiated from the internal defects or the microstructure discontinuities. The precipitation of Laves and δ phases is examined after fatigue tests at high temperatures, and the effect of microstructure on the formation and the propagation of the microstructural small cracks is also discussed. Full article
(This article belongs to the Special Issue Fatigue and Fracture of Additively Manufactured Materials)
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