Lattice matching of D023 and D022 phases in Al-6at.%(Ti,V,Zr) systems

Han, Sz; Park, Si; Js, Huh; Lee, Zin-Hyoung; Lee, HyuckMo

doi:10.1016/s0921-5093(96)10857-1

Cited by 21 publications

(5 citation statements)

References 17 publications

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“…A number of other low diffusivity transition elements, including Sc, Ti and V, have been proposed, which substitute for Zr in the Al3Zr phase [7], in order to further increase the resistance to coarsening. Amongst them, V is one of the most promising candidates since it possesses the lowest diffusivity in aluminium.…”

Section: Introductionmentioning

confidence: 99%

Characterising precipitate evolution in multi-component cast aluminium alloys using small-angle X-ray scattering

Wang

McCartney

et al. 2017

Journal of Alloys and Compounds

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The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. AbstractAluminium alloys can be strengthened significantly by nano-scale precipitates that restrict dislocation movement. In this study, the evolution of inhomogenously distributed trialuminide precipitates in two multi-component alloys was characterised by synchrotron small-angle Xray scattering (SAXS). The appropriate selection of reference sample and data treatment required to successfully characterise a low volume fraction of precipitates in multi-component alloys via SAXS was investigated. The resulting SAXS study allowed the analysis of statistically significant numbers of precipitates (billions) as compared to electron microscopy (hundreds). Two cast aluminium alloys with different volume fractions of Al3ZrxV1-x precipitates were studied. Data analysis was conducted using direct evaluation methods on SAXS spectra and the results compared with those from transmission electron microscopy (TEM). Precipitates were found to attain a spherical structure with homogeneous chemical composition. Precipitate evolution was quantified, including size, size distribution, volume fraction and number density. The results provide evidence that these multi-component alloys have a short nucleation stage, with coarsening dominating precipitate size. The coarsening rate constant was calculated and compared to similar precipitate behaviour.2

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Section: Introductionmentioning

confidence: 99%

Characterising precipitate evolution in multi-component cast aluminium alloys using small-angle X-ray scattering

Wang

McCartney

et al. 2017

Journal of Alloys and Compounds

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“…[15][16][17][18][19] Titanium is an important additive in the manufacturing process of Al-B 4 C composites using the liquid mixing method. 20,21 To facilitate the manufacturing of Al-B 4 C composites, the addition of a certain amount of Ti is necessary to prevent the degradation of B 4 C and to increase its stability by the in situ formation of a protectiveTiB 2 layer on the B 4 C surface. In a previous study, 22 the positive role of Zr was attributed to the high density of the metastable L12-Al 3 Zr precipitates forming coherently with the matrix during the decomposition of the supersaturated solid solution.…”

Section: Introductionmentioning

confidence: 99%

Metallographic investigation of tensile- and impact-tested aluminum composites

Ibrahim

Ammar

Alkahtani

et al. 2015

Journal of Composite Materials

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The present work was performed on two composites: Al-15 vol.% B4C and experimental 6063/15% B4C. Additions of 0.45% Ti + 0.25% Zr were made to both composites melts. The composites were cast from the respective melts at 730℃ using two metallic molds to produce tensile as well as impact test samples. All samples were solution heat treated for 24 h at 540℃ for both composites, followed by aging at 200℃ for 10 h. Samples for microstructure and fractography were examined using field emission scanning electron microscopy. The results show that the powder injection technique used in this study produces composites with B4C uniformly distributed throughout the matrix. The strength and impact toughness of the two composites are controlled by the simultaneous precipitation of Al3Zr and Mg2Si phase particles depending on the matrix type. Hardening caused by precipitation of Mg2Si is more pronounced than that caused by Al3Zr phase precipitation. No B4C particle debonding was observed due to the presence of Zr-/Ti-rich layers surrounding the B4C particles. The cracks mainly propagate through the B4C reinforcement particles.

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“…First, the statistical regression and neural network methods were applied to acquire the constitutive equation [1][2][3][4][5][6]. Second, based on the understanding of deformation mechanism, the constitutive equation was established with the microstructure variation incorporated into the model.…”

Section: Introductionmentioning

confidence: 99%

A Constitutive Equation Coupling the Grain Size during the High Temperature Deformation of Ti-6.62Al-5.14Sn-1.82Zr Alloy

Luo

2007

MSF

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A constitutive equation has been established to describe the effect of grain size on the deformation behavior of Ti-6.62Al-5.14Sn-1.82Zr alloy during the high temperature. In this paper, firstly a steady flow stress model is proposed, and a function relating to the grain size is introduced to modify the steady flow stress model. Meanwhile, a microstructure model established by the fuzzy neural network method is applied to calculate the grain size of prior α phase during the high temperature deformation of Ti-6.62Al-5.14Sn-1.82Zr alloy. The calculated flow stress using the present constitutive equation shows a good agreement with the experimental flow stress of the Ti-6.62Al-5.14Sn-1.82Zr alloy. The relative maximum error was not more than 15%.

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Lattice matching of D023 and D022 phases in Al-6at.%(Ti,V,Zr) systems

Cited by 21 publications

References 17 publications

Characterising precipitate evolution in multi-component cast aluminium alloys using small-angle X-ray scattering

Characterising precipitate evolution in multi-component cast aluminium alloys using small-angle X-ray scattering

Metallographic investigation of tensile- and impact-tested aluminum composites

A Constitutive Equation Coupling the Grain Size during the High Temperature Deformation of Ti-6.62Al-5.14Sn-1.82Zr Alloy

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