Effect of Heating Rate on the Phases Formation in Ti-20 wt. % Al Powder Mixture

In this paper the comparison of NiTiAl10 wt. % with the binary NiTi46 wt. % prepared by powder metallurgy was researched. The method of combustion synthesis was carried out under following conditions: sintering temperature of 800 °C and 1100 °C and heating rate approx. 300 °C.min-1. The addition of aluminium into NiTi46 wt. % powder mixture completely changed the temperature of combustion synthesis and phase evolution during sintering. The reactions into Ni-Ti-Al powder mixture started below the melting temperature of aluminium and the new phases were formed in microstructure. The process of reactive sintering was studied by differential thermal analysis using the heating rate of 30 °C.min-1 and 100 °C.min-1 using combination of induction furnace and optical pyrometer. The addition of aluminium influenced microstructure significantly and increased the hardness of samples.

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Shock-wave compacting of a Fe-Ni-Al powder mixture and its study

The Physics of Metals and Metallography ◽

10.1134/s0031918x06110135 ◽

2006 ◽

Vol 102 (5) ◽

pp. 541-544

Author(s):

F. Kh. Akopov ◽

V. M. Gabuniya ◽

G. I. Mamniashvili ◽

G. S. Martkoplishvili ◽

G. Sh. Oniashvili ◽

...

Keyword(s):

Shock Wave ◽

Powder Mixture ◽

Al Powder

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Influence of ball milling duration on the morphology, features of the structural-phase state and microhardness of 3Ni-Al powder mixture

Advanced Powder Technology ◽

10.1016/j.apt.2021.07.028 ◽

2021 ◽

Author(s):

Ivan A. Ditenberg ◽

Denis A. Osipov ◽

Michail A. Korchagin ◽

Ivan V. Smirnov ◽

Konstantin V. Grinyaev ◽

...

Keyword(s):

Ball Milling ◽

Powder Mixture ◽

Phase State ◽

Structural Phase ◽

Structural Phase State ◽

Milling Duration ◽

Al Powder

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Self-Consolidation and Surface Modification of Mechanical Alloyed Ti-25.0 at.% Al Powder Mixture by Using an Electro-Discharge Technique

Archives of Metallurgy and Materials ◽

10.1515/amm-2017-0195 ◽

2017 ◽

Vol 62 (2) ◽

pp. 1293-1297 ◽

Cited By ~ 1

Author(s):

S.Y. Chang ◽

H.S. Jang ◽

Y.H. Yoon ◽

Y.H. Kim ◽

J.Y. Kim ◽

...

Keyword(s):

Surface Modification ◽

Diffusion Process ◽

Powder Mixture ◽

Electrical Discharge ◽

External Pressure ◽

Solid Core ◽

Input Energy ◽

Electrical Discharges ◽

Al Powder ◽

Solid Bulk

AbstractElectrical discharges using a capacitance of 450 μF at 0.5, 1.0, and 1.5 kJ input energies were applied in a N2atmosphere to obtain the mechanical alloyed Ti3Al powder without applying any external pressure. A solid bulk of nanostructured Ti3Al was obtained as short as 160 μsec by the Electrical discharge. At the same time, the surface has been modified into the form of Ti and Al nitrides due to the diffusion process of nitrogen to the surface. The input energy was found to be the most important parameter to affect the formation of a solid core and surface chemistry of the compact.

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Al-Ti-B4C materials obtained by high-temperature synthesis and used as a master-alloy for aluminum

MATEC Web of Conferences ◽

10.1051/matecconf/201824300010 ◽

2018 ◽

Vol 243 ◽

pp. 00010 ◽

Cited By ~ 2

Author(s):

Ilya Zhukov ◽

Vladimir Promakhov ◽

Yana Dubkova ◽

Alexey Matveev ◽

Mansur Ziatdinov ◽

...

Keyword(s):

High Temperature ◽

Burning Rate ◽

Powder Mixture ◽

Pure Aluminum ◽

Al Alloy ◽

Initial Powder ◽

Temperature Synthesis ◽

Al Content ◽

High Temperature Synthesis ◽

Al Powder

The paper presents microstructure, composition, and burning rate of Al alloy produced by high-temperature synthesis (SHS) from powder mixture Al-Ti-B4C with different concentration of Al powder. It has been established that the phase composition of materials obtained at gas-free combustion includes TiB2, Al, and TiC. It is shown that Al content growth powder in initial Al-Ti- B4C mixture from 7.5 to 40 wt.% reduces the burning rate of the powder from 9*10-3 to 1.8*10-3 m/s. For the system consisting of 60 wt.% of (Ti + B4C) and 40 wt.% of Al there is the increase in the porosity of the compacted initial powder mixture from 30 to 51 and reduction in the burning rate from 1.8 * 10-3 to 1 * 10-3 m/s. The introduction of 0.2 wt.% of the obtained SHS materials into the melt of pure aluminum causes reduction of the grain size of the resulting alloy from 1200 to 410 μm.

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Carbide formation in electric-discharge-sintered Ti3Al compact caused by steric acid in ball-milled Ti and Al powder mixture

Ceramics International ◽

10.1016/j.ceramint.2018.07.233 ◽

2018 ◽

Vol 44 (16) ◽

pp. 19771-19778 ◽

Cited By ~ 1

Author(s):

W.H. Lee ◽

Y.W. Cheon ◽

K.B. Kim ◽

Y.H. Yoon ◽

C.H. Jeong ◽

...

Keyword(s):

Electric Discharge ◽

Powder Mixture ◽

Carbide Formation ◽

Al Powder

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Effect of aluminium content and processing parameters on the microstructure and mechanical properties of laser powder-bed fused magnesium-aluminium (0, 3, 6, 9wt%) powder mixture

Rapid Prototyping Journal ◽

10.1108/rpj-08-2018-0213 ◽

2019 ◽

Vol 25 (4) ◽

pp. 744-751 ◽

Cited By ~ 1

Author(s):

Xiaomiao Niu ◽

Hongyao Shen ◽

Guanhua Xu ◽

Linchu Zhang ◽

Jianzhong Fu ◽

...

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Powder Mixture ◽

Processing Parameters ◽

Al Alloy ◽

Content Type ◽

Powder Bed ◽

Al Content ◽

Microstructure And Mechanical Properties ◽

Al Powder

Purpose Mg-Al powder mixture was used to manufacture Mg-Al alloy by laser powder bed fusion (LPBF) process. This study aims to investigate the influence of initial Al content and processing parameters on the formability, microstructure and consequent mechanical properties of the laser powder bed fused (LPBFed) component. Design/methodology/approach In this study, Al powder with different weight ratio ranged from 3 to 9 per cent was mixed with pure Mg powder, and the powder mixture was processed using different LPBF parameters. Microstructure and compressive properties of the LPBFed components were examined. Findings It was found that the presence of Al significantly modified the microstructure and improved the mechanical properties of the LPBFed components. Higher volume of ß-Al12Mg17 precipitates was produced at higher initial Al content and higher laser energy density. For this reason, the a-Mg was significantly refined and the compressive strength was improved. The highest yield compressive strength achieved was 279 MPa when using Mg-9 Wt. % Al mixture. Originality/value This work demonstrates that LPBF of Mg-Al powder mixture was a viable way to additively manufacture Mg-Al alloy. Both Al content and processing parameters can be modified to control the microstructure and mechanical properties of the LPBFed components.

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