Microstructure evolution of the TiB2/Al composites fabricated by powder metallurgy during hot extrusion

Yang, Qing; Cheng, Dawei; Liu, Jun; Wang, L.; Chen, Z.; Wang, M.L.; Zhong, Shengyi; Wu, Yi; Ji, Gang; Wang, H.W.

doi:10.1016/j.matchar.2019.109834

Cited by 31 publications

(2 citation statements)

References 46 publications

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“…3 f. This relatively large amount of orientation spread inside the larger grains is indicative of the development of a sub-grain structure 21 . This also means that dislocation slip occurs preferentially within larger grains, while in smaller grains grain boundary sliding dominates 22 .…”

Section: Resultsmentioning

confidence: 99%

Revealing the strengthening contribution of stacking faults, dislocations and grain boundaries in severely deformed LPBF AlSi10Mg alloy

Snopiński,

Kotoul,

Petruška

et al. 2023

Sci Rep

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In this study, microstructural features direct metal laser melted (DMLM) aluminium–silicon-magnesium (AlSi10Mg) are investigated using advanced transmission electron microscopy (TEM) and high-resolution TEM (HRTEM). The focus is on post-processing by ECAP (Equal Channel Angular Pressing) and its effects on grain refinement, stacking fault formation and dislocation accumulation. In addition, the strength enhancing role of stacking faults is for the first time quantified. The results show that ECAP can increase the yield strength from 294 to 396 MPa, while the elongation increases from 2.4% to 6%. These results show that ECAP processing offers a new approach for producing AlSi10Mg products with improved strength and ductility.

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Section: Resultsmentioning

confidence: 99%

Revealing the strengthening contribution of stacking faults, dislocations and grain boundaries in severely deformed LPBF AlSi10Mg alloy

Snopiński,

Kotoul,

Petruška

et al. 2023

Sci Rep

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“…It is inevitable that particles clusters formed by direct casting will accelerate the process of crack nucleation and propagation during deformation [ 23 , 24 ]. In contrast to PRAMCs prepared by casting, in-situ PRAMCs fabricated by powder metallurgy (PM) in this study initially consist of fine grain structure, dispersed particles and strong interface bonding strength, which have an important impact on the high-temperature deformation behavior and safe processing windows [ 25 ]. Therefore, it is necessary to undertake a systematic investigation on the hot deformation behavior and workability of in-situ PRAMCs fabricated by PM.…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behavior and Workability of In-Situ TiB2/7050Al Composites Fabricated by Powder Metallurgy

Zhu

Liu

et al. 2020

Materials

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Isothermal compression tests of in situ TiB2/7050Al composites fabricated by powder metallurgy were performed at 300–460 °C with the strain rate varying from 0.001 s−1 to 1 s−1. The Arrhenius constitutive equation and hot processing map of composites were established, presenting excellent hot workability with low activation energies and broad processing windows. Dramatic discontinuous/continuous dynamic recrystallization (DDRX/CDRX) and grain boundary sliding (GBS) take place in composites during deformation, depending on the Zener-Hollomon parameter (Z) values. It was found that initially uniform TiB2 particles and fine grain structures are beneficial to the DDRX, which is the major softening mechanism in composites at high Z values. With the Z value decreasing, dynamic recovery and CDRX around particles are enhanced, preventing the occurrence of DDRX. In addition, fine grain structures in composites are stable at elevated temperature thanks to the pinning of dense nanoparticles, which triggers the occurrence of GBS and ensures good workability at low Z values.

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Investigation of Hot Workability and Microstructure Evolution of VGCNFs-Reinforced Aluminum Matrix Composites

Guo

Liu

Shi

et al. 2020

Metall Mater Trans A

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Microstructure evolution of the TiB2/Al composites fabricated by powder metallurgy during hot extrusion

Cited by 31 publications

References 46 publications

Revealing the strengthening contribution of stacking faults, dislocations and grain boundaries in severely deformed LPBF AlSi10Mg alloy

Revealing the strengthening contribution of stacking faults, dislocations and grain boundaries in severely deformed LPBF AlSi10Mg alloy

Hot Deformation Behavior and Workability of In-Situ TiB2/7050Al Composites Fabricated by Powder Metallurgy

Investigation of Hot Workability and Microstructure Evolution of VGCNFs-Reinforced Aluminum Matrix Composites

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