Microstructure and mechanical properties of Ti–Re alloys manufactured by selective laser melting

Majchrowicz, Kamil; Pakieła, Zbigniew; Brynk, Tomasz; Romelczyk-Baishya, Barbara; Płocińska, Magdalena; Kurzynowski, Tomasz; Chlebus, Edward

doi:10.1016/j.msea.2019.138290

Cited by 28 publications

(11 citation statements)

References 49 publications

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“…To evaluate mechanical properties and plastic anisotropy of the DSR-processed sheets, uniaxial tensile tests were conducted on a static testing machine Zwick/Roell Z005 equipped with a 1 kN load cell. The miniaturized tensile samples with a gauge length of 10 mm and a cross-section of 1.6 × 1.2 mm (described more in detail in [ 32 , 33 ]) were cut at angles of 0, 45 and 90° to the RD. Three samples through the sheet thickness were obtained for each direction.…”

Section: Methodsmentioning

confidence: 99%

Microstructure, Texture and Mechanical Properties of Mg-6Sn Alloy Processed by Differential Speed Rolling

et al. 2020

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The effect of shear deformation introduced by differential speed rolling (DSR) on the microstructure, texture and mechanical properties of Mg-6Sn alloy was investigated. Mg-6Sn sheets were obtained by DSR at speed ratio between upper and lower rolls of R = 1, 1.25, 2 and 3 (R = 1 refers to symmetric rolling). The microstructural and textural changes were investigated by electron backscattered diffraction (EBSD) and XRD, while the mechanical performance was evaluated based on tensile tests and calculated Lankford parameters. DSR resulted in the pronounced grain refinement of Mg-6Sn sheets and spreading of basal texture as compared to conventionally rolled one. The average grain size and basal texture intensity gradually decreased with increasing speed ratio. The basal poles splitting to transverse direction (TD) or rolling direction (RD) was observed for all Mg-6Sn sheets. For the as-rolled sheets, YS and UTS increased with increasing speed ratio, but a significant anisotropy of strength and ductility between RD and TD has been observed. After annealing at 300 °C, Mg-6Sn sheets became more homogeneous, and the elongation to failure was increased with higher speed ratios. Moreover, the annealed Mg-6Sn sheets were characterized by a very low normal anisotropy (0.91–1.16), which is normally not achieved for the most common Mg-Al-Zn alloys.

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Section: Methodsmentioning

confidence: 99%

Microstructure, Texture and Mechanical Properties of Mg-6Sn Alloy Processed by Differential Speed Rolling

et al. 2020

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“…Mixed powders were used in this study as prealloyed TiTa powders are not yet commercially available. Mixed powders are used extensively to explore new alloy systems for additive manufacturing; − however, they can result in reduced homogeneity compared with their prealloyed powder counterparts. By optimizing the processing parameters in previous works, , it was demonstrated that matrix homogeneity could be achieved, with minimal remaining Ta particles.…”

Section: Materials and Methodsmentioning

confidence: 99%

Osteogenic Potential of Additively Manufactured TiTa Alloys

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Robinson

Sigston

et al. 2021

ACS Appl. Bio Mater.

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The only alloy currently utilized for additive manufacture of bone implants, Ti–6Al–4V, has a high elastic modulus and bioinert surface, potentially inducing stress shielding and hindering osseointegration. Low-modulus materials with bioactive surfaces could significantly reduce implant failure rates by improving the interaction between implants and the surrounding bone. In this study, laser powder bed fusion Ti25Ta and Ti65Ta alloys, highlighted previously for their low moduli, were assessed for their surface osteogenic potential, using human bone marrow mesenchymal stromal cells (hBMSCs). Polished metallic substrates were utilized to avoid the effects of surface topography on cell fate and highlight the chemical effect of the Ta content. Electron-dispersive X-ray and X-ray photoelectron spectroscopy revealed surface Ta enrichment on the polished TiTa substrates. XPS measured Ta oxide contents of 8.0 and 16.5 at. % for the Ti25Ta and Ti65Ta alloys, respectively. In vitro testing revealed increased alkaline phosphatase activity and mineralization of hBMSCs on the TiTa alloys compared to the Ti–6Al–4V control and only minor differences in biological behavior between the Ti25Ta and Ti65Ta alloys. It was concluded that the Ti25Ta composition, with a lower Ta content but equivalent biological response, was the most promising composition for additively manufactured bone implants.

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“…The mechanical properties of TZ61 and AZ61 sheets were determined by uniaxial tensile tests of miniaturized samples with a gauge length of 10 mm and a cross-section of 1.6 × 1.2 mm 2 , which were conducted on a Zwick/Roell (Ulm, Germany) Z005 testing machine equipped with a 1 kN load cell. The tensile test methodology has been described more in detail in [32,33]. The miniaturized samples were machined from the sheets with their tensile direction parallel to the RD (0 • ), TD (90 • ), and at an angle of 45 • to the RD.…”

Section: Mechanical Properties Characterizationmentioning

confidence: 99%

Comparison of Microstructure, Texture, and Mechanical Properties of TZ61 and AZ61 Mg Alloys Processed by Differential Speed Rolling

et al. 2022

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In this work, the comparison of microstructure, texture, and mechanical properties of the newly developed TZ61 (Mg-6Sn-1Zn) alloy with the commercially available AZ61 (Mg-6Al-1Zn) has been presented. Both analyzed Mg alloys were processed by conventional symmetric and asymmetric rolling (i.e., Differential Speed Rolling—DSR). The microstructure and texture were examined by EBSD and XRD, whereas the mechanical behavior was investigated by uniaxial tensile tests. DSR processing led to more effective grain refinement of both TZ61 and AZ61 sheets. However, a high fraction of Mg2Sn phase precipitates in the TZ61 sheets hindered grain growth what resulted in their smaller grain size as compared to AZ61 sheets. DSR processing lowered also the basal texture intensity in the TZ61 and AZ61 sheets. A unique basal poles splitting was observed for the as-rolled TZ61 alloy, while AZ61 alloy exhibited a typical single-peak basal texture. Finally, the reduced grain size and weakened basal texture by DSR processing caused increase of plasticity of the annealed TZ61 and AZ61 sheets. Nevertheless, the annealed AZ61 sheets showed higher uniform elongation and strength (as compared to TZ61 ones), which has been attributed to their significantly lower texture intensity and greater ability to strain hardening.

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Microstructure and mechanical properties of Ti–Re alloys manufactured by selective laser melting

Cited by 28 publications

References 49 publications

Microstructure, Texture and Mechanical Properties of Mg-6Sn Alloy Processed by Differential Speed Rolling

Microstructure, Texture and Mechanical Properties of Mg-6Sn Alloy Processed by Differential Speed Rolling

Osteogenic Potential of Additively Manufactured TiTa Alloys

Comparison of Microstructure, Texture, and Mechanical Properties of TZ61 and AZ61 Mg Alloys Processed by Differential Speed Rolling

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