An analysis of defects influence on axial fatigue strength of maraging steel specimens produced by additive manufacturing

Meneghetti, Giovanni; Rigon, Daniele; Gennari, Claudio

doi:10.1016/j.ijfatigue.2018.08.034

Cited by 107 publications

(46 citation statements)

References 47 publications

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“…In Meneghetti et al, 33 the influence of defects on the fatigue response of a maraging steel was experimentally assessed. In particular, the specimens were produced in the XY and in the Z directions and tested without performing heat treatments, after a polishing process with progressively finer emery paper from grade 80 up to grade 800.…”

Section: Maraging Steelmentioning

confidence: 99%

Fatigue failures from defects in additive manufactured components: A statistical methodology for the analysis of the experimental results

Tridello

Niutta

Berto

et al. 2021

Fatigue Fract Eng Mat Struct

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The fatigue response of additive manufactured (AMed) components is generally controlled by the defect population, and the models for assessing the fatigue response of AMed parts have to take into account the distribution of defect size and the intrinsic scatter associated to the fatigue response. In the present paper, a statistical methodology for analyzing the results of tests on AMed specimens failed due to cracks originating from defects is proposed. The procedure involves the estimation of the distribution of the fatigue life, which is considered dependent on the applied stress amplitude and on the defect size. Thereafter, all the experimental failures are shifted at a reference number of cycles to failure or stress amplitude, making it possible to compare data obtained at different stress levels or number of cycles to failure. The proposed method has been successfully validated on literature dataset, proving its effectiveness and general validity.

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Section: Maraging Steelmentioning

confidence: 99%

Fatigue failures from defects in additive manufactured components: A statistical methodology for the analysis of the experimental results

Tridello

Niutta

Berto

et al. 2021

Fatigue Fract Eng Mat Struct

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“…Porosities due to a localized lack of fusion during the process have, however, a strong impact on the ultimate strain and the fatigue life. The fatigue response of metals manufactured using L-PBF has not been extensively studied until very recently [5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Even though toughness is generally high, fatigue performances appear to remain inferior to those obtained by conventional means.…”

Section: Introductionmentioning

confidence: 99%

Rapid characterization of the fatigue limit of additive-manufactured maraging steels using infrared measurements

Douellou

Balandraud

Duc

et al. 2020

Additive Manufacturing

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This paper deals with the fatigue performance of maraging steels manufactured by Powder Bed Fusion using a laser beam (L-PBF). The objective of the study was to develop a method for the rapid and reliable characterization of the produced material's fatigue limit using infrared (IR) thermography.Preliminary conventional fatigue tests were performed, revealing two distinct populations among the printed specimens depending on their locations on the building plate. Next, fatigue tests instrumented by IR camera were processed using heat source reconstruction to measure the mechanical dissipation due to fatigue damage. A statistical model was then proposed to identify the fatigue limit of the material. Finally, a practical application was performed to compare different manufacturing strategies using the same powder, opening perspectives for the rapid optimization of the printing process with respect to the fatigue performance of the parts produced.

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“…It might be expected that a degree of transverse strain anisotropy was likely to remain due to the fabrication history, which was reported for AM alloys [27]. Moreover, the presence of detrimental surface and subsurface defects could cause some scatter in the strength and fatigue test results [28]. Obtained 0.2% offset yield strength R 0.2 and maximum withstandable stress R m of the AM samples of maraging steel may be considered repeatable in the satisfactory range.…”

Section: Fatigue Testsmentioning

confidence: 68%

Performance of Maraging Steel Sleeves Produced by SLM with Subsequent Age Hardening

Tyczyński¹,

Siemiątkowski

Bąk³

et al. 2020

Materials

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In the paper, the researches on sleeves made out of maraging steel 1.2709 using selective laser melting (SLM) technology are presented. This additive technology is recognized as favorable for the environment, due to 100% use of material and durability of manufactured details. The fabricated sleeves underwent subsequent tests, in particular, microhardness, porosity and homogeneity of the material was examined before and after heat treatment and salt bath nitrocarburizing process. Two kinds of fatigue tests were performed. The first consisted of the typical sinusoidal alternating load, the other was the high pressure pulse load test close to the real work conditions. It is of high importance that the fatigue strength of the tested sleeves is considerably higher than that of the similarly produced details shaped as a standard samples for tensile stress. The Mössbauer spectrometry analysis of hyperfine magnetic field distributions proved that SLM did not change considerably the martensite structure at atomic level.

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An analysis of defects influence on axial fatigue strength of maraging steel specimens produced by additive manufacturing

Cited by 107 publications

References 47 publications

Fatigue failures from defects in additive manufactured components: A statistical methodology for the analysis of the experimental results

Fatigue failures from defects in additive manufactured components: A statistical methodology for the analysis of the experimental results

Rapid characterization of the fatigue limit of additive-manufactured maraging steels using infrared measurements

Performance of Maraging Steel Sleeves Produced by SLM with Subsequent Age Hardening

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