Assessing the Lightweight Potential of Additively Manufactured Metals by Density-Specific Woehler and Shiozawa Diagrams

Merghany, M.; Teschke, Mirko; Stern, Felix; Tenkamp, Jochen; Walther, Frank

doi:10.3389/fmech.2022.957859

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…Shiozawa's approach based on linear–elastic fracture mechanics can take into account the process‐induced defects for different AM alloys (AlSi10Mg, 316 L, and TNM‐B1) as shown in another study. [ 42 ] This approach can also consider the effect of the mean stress and size effect; however, it fails to take the effect of cyclic plasticity into account. [ 43 ] It should be noted that eventually the heterogeneous microstructure across the weld can affect the scatter in the data and reliability of the results.…”

Section: Resultsmentioning

confidence: 99%

Integrity Assessment of Electron‐Beam‐Welded Joints of Additively Manufactured AlSi10Mg Components

Moeini,

Merghany,

Vogelsang

et al. 2023

Adv Eng Mater

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Laser‐based powder bed fusion of metals (PBF‐LB/M) was found to be a promising processing method for the fabrication of components with no limits of complexity by adding layers upon layers of material. However, drawbacks such as productivity and dimension limitations adversely affect the employment of the AM components in envisaged applications. This brings welding and joining techniques into play to integrate AM metal parts into larger assemblies. In this research, electron beam (EB) welding is employed to join the AlSi10Mg specimens, fabricated via two different manufacturing processes, i.e., PBF‐LB/M and casting. The main focus is to study the quasi‐static and fatigue behavior of similar and dissimilar welded joints in different combinations, namely AM‐AM, AM‐Cast, and Cast‐Cast, alongside the microstructure analyses, to investigate the correlation between the microscopic and macroscopic properties. Dissimilar welded joints demonstrate inferior material strength, which can be attributed to the inherent coarse microstructure of the cast material. Although similar welded joints of AM components suffer from a high porosity in the weld zone, they have shown a better fatigue life, which can be contributed to the equiaxed eutectic microstructure in the welded area.This article is protected by copyright. All rights reserved.

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Section: Resultsmentioning

confidence: 99%

Integrity Assessment of Electron‐Beam‐Welded Joints of Additively Manufactured AlSi10Mg Components

Moeini,

Merghany,

Vogelsang

et al. 2023

Adv Eng Mater

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“…For example, in Refs. 23 – 25 , methodologies for the assessment of the fatigue response in function of the defect size, have been proposed starting from the Paris law and the Murakami model. The approaches in Refs.…”

Section: Introductionmentioning

confidence: 99%

Experimental scatter of the fatigue response of additively manufactured components: a statistical method based on the Profile Likelihood

Tridello,

Boursier Niutta,

Rossetto

et al. 2023

Sci Rep

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The fatigue response of additively manufactured (AM) specimens is mainly driven by manufacturing defects, like pores and lack of fusion defects, which are mainly responsible for the large variability of fatigue data in the S–N plot. The analysis of the results of AM tests can be therefore complex: for example, the influence of a specific factor, e.g. the building direction, can be concealed by the experimental variability. Accordingly, appropriate statistical methodologies should be employed to safely and properly analyze the results of fatigue tests on AM specimens. In the present paper, a statistical methodology for the analysis of the AM fatigue test results is proposed. The approach is based on shifting the experimental failures to a reference number of cycles starting from the estimated P–S–N curves. The experimental variability of the fatigue strength at the reference number of cycles is also considered by estimating the profile likelihood function. This methodology has been validated with literature datasets and has proven its effectiveness in dealing with the experimental scatter typical of AM fatigue test results.

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Fatigue and short crack assessment of powder bed fusion laser-based fabricated AlSi10Mg miniature specimens under alternating bending load

Stammkötter,

Tenkamp,

Teschke

et al. 2024

Materials & Design

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Assessing the Lightweight Potential of Additively Manufactured Metals by Density-Specific Woehler and Shiozawa Diagrams

Cited by 3 publications

References 16 publications

Integrity Assessment of Electron‐Beam‐Welded Joints of Additively Manufactured AlSi10Mg Components

Integrity Assessment of Electron‐Beam‐Welded Joints of Additively Manufactured AlSi10Mg Components

Experimental scatter of the fatigue response of additively manufactured components: a statistical method based on the Profile Likelihood

Fatigue and short crack assessment of powder bed fusion laser-based fabricated AlSi10Mg miniature specimens under alternating bending load

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