scholarly journals The effect of heat treatment on α/ β phases evolution of TC4 titanium alloy fabricated by spark plasma sintering

2020 ◽  
Vol 50 ◽  
pp. 713-718
Author(s):  
Kaihua Xu ◽  
Yong Xue ◽  
Zhimin Zhang ◽  
Qiang Wang ◽  
Jiangpeng Yan ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Titanium Alloy ◽  
Spark Plasma Sintering ◽  
Tc4 Titanium Alloy ◽  
Plasma Sintering ◽  
Spark Plasma

Effect of Different Deformation Methods on Microstructure Evolution of TC4 Titanium Alloy Prepared by Spark Plasma Sintering

2020 ◽  
Vol 993 ◽  
pp. 254-258
Author(s):  
Yong Xue ◽  
Jiang Peng Yan ◽  
Hong Zhi Fan ◽  
Hai Jun Liu ◽  
Zhi Min Zhang ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Dynamic Recrystallization ◽  
Relative Density ◽  
Spark Plasma Sintering ◽  
Microstructure Evolution ◽  
Alloy Powder ◽  
Tc4 Titanium Alloy ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Number Of Passes

TC4 titanium alloy powder was made into the test piece by spark plasma sintering. The hot deformation of TC4 titanium alloy was performed on the Gleeble-1500 experiment machine. The effects of microstructure were studied. The results show that the number of passes increased with the increasing of the relative density at the same amount of deformation. The relative density have an important influence in one-pass deformation. At the deformation temperature of 950°C and a strain rate of 0.1s-1, the microstructure of TC4 titanium alloy was the weave-basket structure, and the widmanstatten structure existed. The increase in the number of passes could promote the growth of dynamic recrystallization grains under the same amount of deformation.

scholarly journals Microstructure evolution of TC4 powder by spark plasma sintering after hot deformation

2020 ◽  
Vol 39 (1) ◽  
pp. 457-465
Author(s):  
Jiangpeng Yan ◽  
Zhimin Zhang ◽  
Jian Xu ◽  
Yaojin Wu ◽  
Xi Zhao ◽  
...  
Keyword(s):  
Strain Rate ◽  
Relative Density ◽  
Spark Plasma Sintering ◽  
Hot Deformation ◽  
Tc4 Titanium Alloy ◽  
Weave Structure ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Average Relative Density ◽  
Low Strain Rate

AbstractThe cylindrical samples of TC4 titanium alloy prepared by spark plasma sintering (SPS) were compressed with hot deformation of 70% on the thermosimulation machine of Gleeble-1500. The temperature of the processes ranged from 850°C to 1,050°C, and the strain rates varied between 0.001 and 5 s−1. The relative density of the sintered and compressed samples was measured by the Archimedes principle. During hot deformation, the microstructure of the sample was observed. The results show that the average relative density of the samples was 90.2% after SPS. And the relative density was about 98% after the hot deformation of 70%. Under high temperature (>950°C), the sensitivity of flow stress to temperature was reduced. At low strain rate (0.001 s−1), the increase in the deformation temperature promoted the growth of dynamic recrystallization (DRX). At the same temperature, the increase in strain rate slowed down the growth of DRX grains. And the variation tendency was shown from the basket-weave structure to the Widmanstätten structure at a low strain rate (<0.1 s−1), with increase in the strain rate.

Sintering Behavior of TiC-Fe Based Composite Fabricated by Spark Plasma Sintering Using TiH2 Graphite Powders

2007 ◽  
Vol 534-536 ◽  
pp. 217-220 ◽  
Author(s):  
Sung Yeal Bae ◽  
In Sup Ahn ◽  
Ho Jung Cho ◽  
Chul Jin Kim ◽  
Dong Kyu Park
Keyword(s):  
Heat Treatment ◽  
Spark Plasma Sintering ◽  
Temperature Increase ◽  
Metal Matrix ◽  
Sintering Behavior ◽  
Matrix Composites ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Particulate Reinforced ◽  
Continuous Metal

TiC particulate reinforced Fe matrix composite compacts with controlled interfacial reaction was processed by spark plasma sintering after mechanical alloying. Milled powders were fabricated for 1-5 hours by spex shaker mill with the ball to powder ratio of 25:2. Metal matrix composites (MMCs) based on the Fe-40%TiC system can be synthesized by spark plasma sintering of the D’AE powders with TiH2-graphite powders under vacuum in the temperature range 1273-1473K for 5-20 min. TiC phase was formed by self combustion reaction with temperature increase. The specimen that was formed by sintering Fe-TiC powders displayed a microstructure of uniformly dispersed TiC grain in a continuous metal matrix. The densifications of the TiC-Fe materials were increased as the heat-treatment holding time increasing. In the same time, relative density and hardness of TiC-Fe sintering materials was increased.

High Temperature Microstructural Stability of Si3N4 in TiAl Alloys

2007 ◽  
Vol 534-536 ◽  
pp. 1577-1580
Author(s):  
Jee Hoon Choi ◽  
Dong Bok Lee
Keyword(s):  
Heat Treatment ◽  
High Temperature ◽  
Mechanical Alloying ◽  
Spark Plasma Sintering ◽  
Reaction Layer ◽  
Microstructural Stability ◽  
Tial Alloys ◽  
Plasma Sintering ◽  
The Matrix ◽  
Spark Plasma

Alloys of Ti-50 at.% Al with (3 and 10)wt.% Si3N4 particles were prepared by a mechanical alloying-spark plasma sintering (MA-SPS) method. The matrix consisted primarily of TiAl, Ti2AlN, TiN. Si3N4 was unstable in the matrix and started to decompose forming a Ti5Si3 reaction layer on the surface of former Si3N4 particles during sintering and heat treatment at 1373 K.

scholarly journals Spark plasma sintering for high-rate diffusion welding of a UFG titanium alloy PT3V

2019 ◽  
Vol 558 ◽  
pp. 012029
Author(s):  
A V Nokhrin ◽  
M S Boldin ◽  
E A Lantsev ◽  
M M Vostokov ◽  
M Yu Gryaznov ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Spark Plasma Sintering ◽  
High Rate ◽  
Diffusion Welding ◽  
Plasma Sintering ◽  
Spark Plasma
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