Effect of thermal annealing on microstructure and mechanical properties of a gradient structured tantalum prepared by plasma activated sintering

Zhang, Y.S.; Zhang, X.M.; Bai, X.F.; Pan, Tan; Dong, Fengguang; Li, Z.K.; Yu, Zhentao

doi:10.1016/j.ijrmhm.2011.04.004

Cited by 11 publications

(2 citation statements)

References 10 publications

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“…Annealing is a common heat treatment method used to alter the microstructure and mechanical properties of crystalline metals. Also, this process could reduce hardness by decreasing dislocation densities and grain size [15][16][17][18][19]. Furthermore, annealing is an appropriate method to gain uniformity of microstructure and minimise gradients in grain size, grain morphology, and non-uniform mechanical properties, including ones under high strain rate and large plastic strain circumstances [20].…”

Section: Introductionmentioning

confidence: 99%

Investigation on microstructure and high strain rate behaviour of pure tantalum prepared by hot press and subsequent annealing treatment

et al. 2019

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Among refractory metals, tantalum has long been the primary material of use in high strain rate applications. Hot pressing (HP) is a technique to produce specimens with high density and homogeneous microstructure. The individual effect of the HP or annealing heat treatment on high strain rate properties of tantalum powder compacts has been investigated, but little attention has been paid to the combined effect of subsequent annealing. In this study, the effect of annealing on the microstructure and mechanical properties of tantalum subjected to hardness and Split Pressure Hopkinson Bar (SHPB) test was investigated. After annealing at 1100°C, the grains are coarsened, thereby hardness and upper yield strength decreased to value 199 VHN and 1833 MPa, respectively. Moreover, an obvious increase in plasticity and toughness is detected at this temperature, indicating subsequent annealing is beneficial to improve the deformation properties of HPed powder compacts; the maximum plasticity of tantalum was 31.74% after annealing.

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Section: Introductionmentioning

confidence: 99%

Investigation on microstructure and high strain rate behaviour of pure tantalum prepared by hot press and subsequent annealing treatment

et al. 2019

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“…6 One of the main advantage of this method is a significantly shorter sintering time compared with traditional hot pressing or hot isostatic pressing due to high heating rates employed in the range of 100 to 600uC min 21 . 2,[7][8][9][10] Sintering is conducted at comparatively lower temperatures with shorter dwell times reducing the threat of vaporisaton and resulting in dense, fine grain structures exhibiting high strength. [11][12][13] Several investigations of extremely high heating rates in SPS have reported localised melting between particles, resulting in accelerated diffusion and densification rates.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of nickel alloy powders processed by spark plasma sintering

et al. 2014

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In this study, nickel alloy powders were consolidated by spark plasma sintering. Experiments were performed between 700 and 750°C temperature range under 50 MPa pressure with holding times from 5 to 10 min. In addition to these main spark plasma sintering parameters three different heating rates ranging from 100 to 235°C min−1 and two different particle size ranges (75–106 μm narrow size distribution and −45 μm wide size distribution) were used for the experiments. After sintering, the sliding wear behaviour of the samples was investigated. The results revealed that the density of the material increased with raising the sintering temperature and holding time. However, heating rate and particle size also played an important role in the densification and these parameters were investigated in detail.

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Formation of core–shell network structural titanium–nitrogen alloys with different nitrogen contents

Zhang

Wang

et al. 2017

J Mater Sci

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Effect of thermal annealing on microstructure and mechanical properties of a gradient structured tantalum prepared by plasma activated sintering

Cited by 11 publications

References 10 publications

Investigation on microstructure and high strain rate behaviour of pure tantalum prepared by hot press and subsequent annealing treatment

Investigation on microstructure and high strain rate behaviour of pure tantalum prepared by hot press and subsequent annealing treatment

Characterisation of nickel alloy powders processed by spark plasma sintering

Formation of core–shell network structural titanium–nitrogen alloys with different nitrogen contents

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