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Micromechanical Tension Testing of Additively Manufactured 17-4 PH Stainless Steel Specimens
Published on: April 7, 2021
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Fatigue Behavior of Additively Manufactured Stainless Steel 316L
1Department of Industrial and Mechanical Engineering, University of Brescia, 25128 Brescia, Italy.
Materials (Basel, Switzerland)
|January 8, 2023
Summary
Additive Manufacturing (AM) of 316L stainless steel shows variable fatigue performance due to processing differences. Surface finish, orientation, and heat treatment significantly impact fatigue strength and lifetime.
Area of Science:
- Materials Science
- Mechanical Engineering
- Biomedical Engineering
Background:
- 316L stainless steel is vital for biomedical applications requiring strength and corrosion resistance.
- Additive Manufacturing (AM) offers new design possibilities but alters material properties compared to traditional methods.
- Assessing the long-term durability of AM 316L components is critical due to microstructural and surface differences.
Purpose of the Study:
- To review and compare fatigue data for Additively Manufactured (AM) 316L stainless steel.
- To analyze the influence of various AM technologies and processing parameters on fatigue performance.
- To critically discuss existing fatigue testing methodologies and propose standardized approaches.
Main Methods:
- Comprehensive literature review of recent studies on fatigue of AM 316L.
- Comparative analysis of fatigue data across different AM techniques (e.g., powder bed fusion, directed energy deposition) and conventional methods.
- Evaluation of processing (e.g., building orientation, printing process) and post-processing (e.g., heat treatment, surface finishing) effects.
Main Results:
- Fatigue data for AM 316L are scattered but reveal clear trends.
- Surface finish, building orientation, and heat treatment significantly influence fatigue strength and lifetime.
- Different AM printing processes exhibit distinct fatigue behaviors.
Conclusions:
- Understanding the complex interplay between processing parameters and fatigue behavior in AM 316L is essential.
- Standardized experimental protocols and data reporting are needed for reliable comparisons.
- Further research is required to optimize AM processes for enhanced fatigue resistance in critical applications.
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