Effects of extrusion on microstructure and tensile properties of 3D network structured TiBw/Ti60 composites fabricated by reaction hot pressing

Hu, Hong; Huang, Lujun; Li, Geng; Liu, Chao; Wang, Bo

doi:10.1016/j.jallcom.2013.08.095

Cited by 48 publications

(6 citation statements)

References 28 publications

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“…However, there were on obvious cracks in the composites. That was because the deformation time was very short and the deformation degree was large, the cracks produced by the fractured TiB whiskers were remedied by the rapid deformation matrix due to the 3D compressive stress in the extrusion process [ 19 ]. There was another phenomenon which was needed to be pointed out that the connectivity of the matrix became better after extrusion.…”

Section: Resultsmentioning

confidence: 99%

“…Although the grain boundary could be strengthened at this time, the connectivity of the matrix deteriorated. After extrusion, the composites underwent elongation deformation in the longitudinal section and at this time the distribution of whiskers would become more dispersed [ 19 ], resulting in the better connectivity of the matrix. It was indirectly implied that the ductility of the as-extruded composites was better than that of the as-sintered composites.…”

Section: Resultsmentioning

confidence: 99%

“…Almost all the literatures studying on the extrusion of the TiB whisker-reinforced TMCs [ 18 , 19 , 22 , 23 ] expressed that the whiskers would break during the subsequent hot deformation process. However, there was no discussion about which parts were liable to rupture.…”

Section: Resultsmentioning

confidence: 99%

“…It is difficult for the hot working of TMCs because of the high deformation temperature and large flow stress. It is inevitable that the TiB whisker would be broken during the deformation process [ 18 , 19 ]. The cracks produced by the broken TiB whisker would reduce the performance of the TMCs.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Hot-Hydrostatic Canned Extrusion on the Stock Utilization, Microstructure and Mechanical Properties of TiBw/TC4 Composites with Quasi-Continuous Network

Feng

Cui

et al. 2017

Materials

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In-situ TiB whisker-reinforced Ti–6Al–4V (TC4) titanium matrix composites (TiBw/TC4) with quasi-continuous networks were successfully fabricated by vacuum hot-pressing sintering. The effects of the hot-hydrostatic canned extrusion on stock utilization, microstructure and mechanical properties of the TiBw/TC4 composites were investigated. It was satisfactory that the utilization of composites could be obviously improved by canned extrusion compared to that extruded without canned extrusion. The microstructure results showed that after canned extrusion the grain was refined and the TiB whiskers were distributed from a random array state to a state in which the whiskers were distributed along the extrusion direction. The properties testing results revealed that the tensile strength, the hardness and the ductility of the composites all significantly improved after extrusion due to the grain refinement and orientation of the TiB whisker caused by extrusion. Tensile fracture results showed that when the TiB whiskers were randomly distributed only part of them played a role in strengthening the matrix during the deformation process (as-sintered composites), while when the TiB whiskers were oriented all whiskers could strengthen the matrix during the tensile testing process (as-extruded composites).

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Hot-Hydrostatic Canned Extrusion on the Stock Utilization, Microstructure and Mechanical Properties of TiBw/TC4 Composites with Quasi-Continuous Network

Feng

Cui

et al. 2017

Materials

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show abstract

“…Over the past years, numerous studies have been carried out on the deformation of titanium and titanium alloys. It has been found that mechanical fibering (grains, second phases and inclusions aligned along the working direction) and texturing as a result of thermomechanical treatment have a great influence on the mechanical properties of materials [4,5,[9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%