The effect of defect population on the anisotropic fatigue resistance of AlSi10Mg alloy fabricated by laser powder bed fusion

Wu, Zhengkai; Wu, Shengchuan; Bao, Jianguang; Qian, Weijian; Karabal, Suleyman; Sun, Wei; Withers, Philip J.

doi:10.1016/j.ijfatigue.2021.106317

Cited by 159 publications

(62 citation statements)

References 39 publications

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“…However, to date, very little work has been reported on the creep behaviour of AlSi10Mg alloy, especially with regards to the creepfatigue interaction. In this respect it is important to note that additive manufacturing can lead to highly anisotropic microstructures and defect morphologies [16][17][18] leading to significant differences between the properties measured along the build direction and perpendicular to it [6,19].…”

Section: Introductionmentioning

confidence: 99%

Hot dwell-fatigue behaviour of additively manufactured AlSi10Mg alloy: Relaxation, cyclic softening and fracture mechanisms

Bao

et al. 2021

International Journal of Fatigue

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Section: Introductionmentioning

confidence: 99%

Hot dwell-fatigue behaviour of additively manufactured AlSi10Mg alloy: Relaxation, cyclic softening and fracture mechanisms

Bao

et al. 2021

International Journal of Fatigue

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“…reported an alumina wear rate with the grain size of 450 nm, 750 nm, and 4 μm as 1.0 × 10 −7 , 4–4.5 × 10 −7 , and 6–6.5 × 10 −7 mm 3 /N m, respectively. Thus, the amount of wear for the grain size of the alumina sintered in the present research (1–4 μm) seems to be logical 32–43 …”

Section: Resultsmentioning

confidence: 61%

“…Thus, the amount of wear for the grain size of the alumina sintered in the present research (1-4 μm) seems to be logical. [32][33][34][35][36][37][38][39][40][41][42][43]…”

Section: Characterization Of the Sintered Samplesmentioning

confidence: 99%

Investigation of nanosized alumina‐binder feedstock rheology for ceramics injection molding (CIM) and survey spark plasma sintering of output green body to obtain transparent alumina

Kallemasih

Loghman-Estarki

Mansouri

et al. 2022

Int J Applied Ceramic Tech

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The purpose of this work is to optimize the feed containing alumina-binder nanoparticles for ceramics injection molding to create transparent alumina parts.In this research, two Alumina with and without MgO as sintering aid fabricated via the spark plasma sintering method. Feed fluidity, fracture toughness, density, IR, and visible transmission of SPSed bodies of the sintered pieces were measured. Furthermore, a pin on the disc test was used on the disk to examine the alumina friction coefficient. The results of feed rheology showed that the sample prepared at 90 • C had the best conditions as a pseudoplastic fluid for the ceramic injection molding (CIM) method. The results showed that a combination of CIM and spark plasma sintering (SPS) methods cause more visible transmission than conventional SPS of alumina nanopowder. Also, the fracture toughness and hardness of as-obtained transparent alumina were in the range of 3.6 MPa m 0.5 and 20.1 MPa, respectively. The wear rate of the as-obtained transparent sample (4.5 × 10 −7 mm 3 /N m) was proportional to the alumina grain size (1-4 μm).

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“…Defects are very detrimental to fatigue performance 8,9 . The existence of defects would limit the fatigue strength and fatigue life of the materials, 10,11 and the size, amount, and location of defects play an important role 12,13 . However, the effect of defects on the FCG rate in SLM Ti6Al4V is not fully understood.…”

Section: Introductionmentioning

confidence: 99%

“…8,9 The existence of defects would limit the fatigue strength and fatigue life of the materials, 10,11 and the size, amount, and location of defects play an important role. 12,13 However, the effect of defects on the FCG rate in SLM Ti6Al4V is not fully understood. Waddell et al 14 found that increasing the porosity in Ti6Al4V by varying the SLM parameters can blunt small cracks and prevent crack growth.…”

Section: Introductionmentioning

confidence: 99%

Different effects of multiscale microstructure on fatigue crack growth path and rate in selective laser melted Ti6Al4V

Wang

Zhang

et al. 2022

Fatigue Fract Eng Mat Struct

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During the selective laser melting (SLM) process of Ti6Al4V, a special structure can be formed with columnar prior β grains along the building direction and fully martensitic α 0 within the β grain. To investigate the influence of such special structure on the fatigue crack growth (FCG) rate, Ti6Al4V specimens fabricated by SLM were heat-treated at two different temperatures in this study. The columnar grains were retained, and the martensite was decomposed when heat-treated below the β transus. It is found that all the SLM features were removed when heat-treated above the β transus. FCG rate tests were subsequently performed at room temperature, and it was found that the prior β grains affected the macroscopic fracture morphology, but there was no discernible influence on the FCG rate. The morphology of the α phase affected the crack growth path and the FCG rate. Changes in the strengthtoughness relationship induced by heat treatment can help understand the decrease in the FCG rate.

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The effect of defect population on the anisotropic fatigue resistance of AlSi10Mg alloy fabricated by laser powder bed fusion

Cited by 159 publications

References 39 publications

Hot dwell-fatigue behaviour of additively manufactured AlSi10Mg alloy: Relaxation, cyclic softening and fracture mechanisms

Hot dwell-fatigue behaviour of additively manufactured AlSi10Mg alloy: Relaxation, cyclic softening and fracture mechanisms

Investigation of nanosized alumina‐binder feedstock rheology for ceramics injection molding (CIM) and survey spark plasma sintering of output green body to obtain transparent alumina

Different effects of multiscale microstructure on fatigue crack growth path and rate in selective laser melted Ti6Al4V

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