A critical assessment of the Archimedes density method for thin-wall specimens in laser powder bed fusion: Measurement capability, process sensitivity and property correlation

Bruce, Daniel; Paradise, Paul; Saxena, Anushree; Clark, Ryan; Noe, Cameron; Benedict, Mark; Broderick, Thomas F.; Bhate, Dhruv

doi:10.1016/j.jmapro.2022.04.059

Cited by 19 publications

(5 citation statements)

References 7 publications

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“…Subsequently, the density of the laser-selective melting and forming specimens was measured using a hydrostatic balance (MP2100J). The principle of Archimedes drainage method (Bruce et al , 2022) is expressed as follows: …”

Section: Experimental Materials and Methodsmentioning

confidence: 99%

Effect of forming angle on the microstructure and properties of GH3536 nickel-based superalloy formed by SLM

Chen,

Huang,

Chen

et al. 2023

RPJ

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Purpose This paper aims to identify the optimal forming angle for the selective laser melting (SLM) process and evaluate the mechanical properties of the SLM-formed GH3536 alloy in the aero-engine field. Design/methodology/approach Forming the samples with optimized parameters and analyzing the microstructure and properties of the block samples in different forming angles with scanning electron microscope, XRD, etc. so as to analyze and reveal the laws and mechanism of the block samples in different forming angles by SLM. Findings There are few cracks on the construction surface of SLM formed samples, and the microstructure shows columnar subgrains and cellular subgrains. The segregation of metal elements was not observed in the microstructure. The pattern shows strong texture strength on the (111) crystal plane. In the sample, the tensile strength of 60° sample is the highest, the plasticity of 90° forming sample is the best, the comprehensive property of 45° sample is the best and the fracture mode is plastic fracture. The comprehensive performance of the part is the best under the forming angle of 45°. To ensure the part size, performance and support structure processing, additional dimensions are added to the part structure. Originality/value In this paper, how to make samples with different forming angles is described. Combined with the standard of forged GH3536 alloy, the microstructure and properties of the samples are analyzed, and the optimal forming angle is obtained.

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Section: Experimental Materials and Methodsmentioning

confidence: 99%

Effect of forming angle on the microstructure and properties of GH3536 nickel-based superalloy formed by SLM

Chen,

Huang,

Chen

et al. 2023

RPJ

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show abstract

“…An advanced field emission scanning electron microscopy (FE‐SEM, SIGMA300, ZEISS) equipped with an energy dispersive spectroscopy (EDS, AZTEC X‐MAX20, OXFORD) and electron backscattered diffraction (EBSD, SYMMETRY, OXFORD) system was used to examine the existence of the phases in the SMCs. The densities of the SMCs were measured by using Archimedes method with an AUY120 Shimadzu electronic balance 28 . Vickers hardness measurements were performed on the polished specimen surfaces using a HUAYIN 200HVS‐5 semiauto hardness tester at 1000 g f with a 10‐s dwell.…”

Section: Methodsmentioning

confidence: 99%

“…The densities of the SMCs were measured by using Archimedes method with an AUY120 Shimadzu electronic balance. 28 Vickers hardness measurements were performed on the polished specimen surfaces using a HUAYIN 200HVS-5 semiauto hardness tester at 1000 g f with a 10-s dwell. Tensile specimens of SMCs were obtained by electrical discharge machining (EDM), and the hot-rolled specimens were axially parallel to the rolling direction (Figure 1B).…”

Section: Microstructure Characterization and Mechanical Testsmentioning

confidence: 99%

In situ experimental study on fracture toughness and damage mechanism of TiB₂‐reinforced steel matrix composites

Chen

et al. 2022

Fatigue Fract Eng Mat Struct

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It is crucial to obtain better fracture property of particle‐reinforced metal matrix composites (PRMMCs) for application in structural parts. In this study, three‐point bending tests are conducted on a TiB2‐reinforced steel matrix composites (SMCs) with 9% and 13% TiB2 volume fractions to understand the effect of hot rolling and particle content on fracture toughness. Results show that increasing particle content has a negative effect on the fracture toughness of SCMs as a whole. Many microcracks induced by large‐size particle fracture initiate in the front of crack tip and coalesce with one another are observed, thus accelerating the main crack propagation. However, hot rolling can effectively improve the fracture toughness and hardness of SMCs with two particle contents. Particle characteristics and matrix plasticity of the SMCs are optimized by hot rolling, which finally enhances the crack propagation resistance. The present work provides guiding suggestions for effectively improving fracture properties of PRMMCs.

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“…The relative density of LPBF-printed Zn samples with different volumetric energy densities was determined using the Archimedes method. The Archimedes method is particularly attractive because of its simplicity and cheapness, as well as high precision and repeatability values reported in the evaluation of standard 10 mm cube samples, especially at high relative density levels [30]. Before the test, a calibrated 200 g mass was used to calibrate the balance.…”

Section: Microstructural Characterizationmentioning

confidence: 99%

Role of heterogenous microstructure and deformation behavior in achieving superior strength-ductility synergy in zinc fabricated via laser powder bed fusion

Dong,

Han,

Zhao

et al. 2024

Int. J. Extrem. Manuf.

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Zinc (Zn) is considered a promising biodegradable metal for implant applications due to its appropriate degradability and favorable osteogenesis properties. In this work, laser powder bed fusion (LPBF) additive manufacturing was employed to fabricate pure Zn with a heterogenous microstructure and exceptional strength-ductility synergy. An optimized processing window of LPBF was established for printing Zn samples with relative densities greater than 99% using a laser power range of 80–90 W and a scanning speed of 900 mm/s. The Zn sample printed with a power of 80 W at a speed of 900 mm/s exhibited a hierarchical heterogenous microstructure consisting of millimeter-scale molten pool boundaries, micrometer-scale bimodal grains, and nanometer-scale pre-existing dislocations, due to rapid cooling rates and significant thermal gradients formed in the molten pools. The printed sample exhibited the highest ductility of ~12.1% among all reported LPBF-printed pure Zn to date with appreciable ultimate tensile strength (~128.7 MPa). Such superior strength-ductility synergy can be attributed to the presence of multiple deformation mechanisms that are primarily governed by heterogeneous deformation-induced hardening resulting from the alternatively arrangement of bimodal Zn grains with pre-existing dislocations. Additionally, continuous strain hardening was facilitated through the interactions between deformation twins, grains and dislocations as strain accumulated, further contributing to the superior strength-ductility synergy. These findings provide valuable insights into the deformation behavior and mechanisms underlying exceptional mechanical properties of LPBF-printed Zn and its alloys for implant applications.

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A critical assessment of the Archimedes density method for thin-wall specimens in laser powder bed fusion: Measurement capability, process sensitivity and property correlation

Cited by 19 publications

References 7 publications

Effect of forming angle on the microstructure and properties of GH3536 nickel-based superalloy formed by SLM

Effect of forming angle on the microstructure and properties of GH3536 nickel-based superalloy formed by SLM

In situ experimental study on fracture toughness and damage mechanism of TiB₂‐reinforced steel matrix composites

Role of heterogenous microstructure and deformation behavior in achieving superior strength-ductility synergy in zinc fabricated via laser powder bed fusion

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A critical assessment of the Archimedes density method for thin-wall specimens in laser powder bed fusion: Measurement capability, process sensitivity and property correlation

Cited by 19 publications

References 7 publications

Effect of forming angle on the microstructure and properties of GH3536 nickel-based superalloy formed by SLM

Effect of forming angle on the microstructure and properties of GH3536 nickel-based superalloy formed by SLM

In situ experimental study on fracture toughness and damage mechanism of TiB2‐reinforced steel matrix composites

Role of heterogenous microstructure and deformation behavior in achieving superior strength-ductility synergy in zinc fabricated via laser powder bed fusion

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In situ experimental study on fracture toughness and damage mechanism of TiB₂‐reinforced steel matrix composites