scholarly journals The Mechanical Properties of Polycrystalline Cu Microwires Having the Crystal Grains Grown by Joule Heating

2019 ◽  
Vol 68 (5) ◽  
pp. 443-449
Author(s):  
Hironori TOHMYOH ◽  
Akihiro FUKUDA ◽  
Yasuhiro KIMURA
Keyword(s):  
Mechanical Properties ◽  
Joule Heating ◽  
Crystal Grains

scholarly journals Fabrication of Metastable Crystalline Nanocomposites by Flash Annealing of Cu47.5Zr47.5Al5 Metallic Glass Using Joule Heating

Nanomaterials ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 84 ◽  
Author(s):  
Ilya Okulov ◽  
Ivan Soldatov ◽  
Ivan Kaban ◽  
Baran Sarac ◽  
Florian Spieckermann ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Metallic Glass ◽  
Heating Rate ◽  
Joule Heating ◽  
Annealing Time ◽  
Volume Fraction ◽  
Glassy Material ◽  
Flash Annealing ◽  
Temperature Equilibrium

Flash Joule-heating was applied to the Cu47.5Zr47.5Al5 metallic glass for designing fully crystalline metastable nanocomposites consisting of the metastable B2 CuZr and low-temperature equilibrium Cu10Zr7 phases. The onset of crystallization was in situ controlled by monitoring resistivity changes in the samples. The effect of heating rate and annealing time on the volume fraction of the crystalline phases and mechanical properties of the nanocomposites was studied in detail. Particularly, an increase of the heating rate and a decrease of the annealing time lead to a lower number of equilibrium Cu10Zr7 precipitates and an increase of tensile ductility. Tailoring of these non-equilibrium microstructures and mechanical properties may not be possible unless one starts with a fully glassy material that opens new perspectives for designing metastable nanomaterials with unique physical properties.

Experimental Study of Nano-Al2O3 Particles Reinforced Fe-Based Composite Coating Made by Laser Cladding

2015 ◽  
Vol 1120-1121 ◽  
pp. 698-701
Author(s):  
Wei Zhang
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Experimental Study ◽  
Composite Coating ◽  
Laser Cladding ◽  
Cladding Layer ◽  
Average Hardness ◽  
Crystal Grains ◽  
Cladding Material ◽  
Three Phases

The experiment of laser cladding on the surface of Cr12 mold steel was made. Ni-coated nano-Al2O3 particles powder was used as cladding material. The microstructure and hardness of laser cladding layer were tested. The research showed that the compact cladding layer without crack, gas hole and other defects could be made by laser cladding. The cladding layer was made up of three phases, Fe-Ni solid solution, Fe-Cr solid solution and nano-Al2O3 particle. nano-Al2O3 particles enhanced the inhomogeneous nucleation of Fe-based alloy, refined the crystal grains and strengthened the mechanical properties of cladding layer. The average hardness of cladding zone was 900 HV0.2 which was 2.2 times higher than that of substrate.

Effect of Solid Solution under High Pressure on the Microstructures and Mechanical Properties of AM60B Alloy

2011 ◽  
Vol 130-134 ◽  
pp. 3216-3220
Author(s):  
Qiu Xiang Liu ◽  
Rui Jun Zhang ◽  
Miao Zhang
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Grain Size ◽  
High Pressure ◽  
Compressive Strength ◽  
Ambient Pressure ◽  
Aging Treatment ◽  
Crystal Grains ◽  
Microstructures And Mechanical Properties ◽  
Strength And Plasticity

Effect of solid solution under high pressure on the microstructures and mechanical properties of AM60B alloy has been investigated. The results show that solid solution under high pressure leads to refined crystal grains of α-Mg phase in the alloys after aging treatment. When the solid solution pressure is about 4GPa, the smallest grain size can be obtained, which is only 8.4% of the grain size when the solid solution is carried out under ambient pressure. Moreover, hardness and compressive strength of AM60B after aging treatment both increase remarkably when the solid solution is performed under high pressure. The superior compressive strength and plasticity can be achieved at 5GPa.

Nanocrystalline Fe73.5 Cu1Nb3Si13.5B9 obtained by direct-current Joule heating. Magnetic and mechanical properties

1993 ◽  
Vol 68 (6) ◽  
pp. 853-860 ◽  
Author(s):  
P. Allia ◽  
M. Baricco ◽  
M. Knobel ◽  
P. Tiberto ◽  
F. Vinai
Keyword(s):  
Mechanical Properties ◽  
Joule Heating ◽  
Direct Current

Joule Heating and mechanical properties of epoxy/graphene based aerogel composite

2021 ◽  
pp. 109199
Author(s):  
Pei Yang ◽  
Subrata Ghosh ◽  
Tian Xia ◽  
Jiacheng Wang ◽  
Mark A. Bissett ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Joule Heating ◽  
Aerogel Composite

GROWTH MODEL OF TiC DENDRITIC CRYSTALS PRODUCED BY LASER SURFACE ALLOYING TECHNIQUE

2006 ◽  
Vol 20 (12) ◽  
pp. 683-689 ◽  
Author(s):  
Y. S. TIAN ◽  
C. Z. CHEN ◽  
L. X. CHEN ◽  
Q. H. HUO
Keyword(s):  
Mechanical Properties ◽  
Growth Model ◽  
Pure Titanium ◽  
Laser Surface ◽  
Spiral Growth ◽  
Surface Alloying ◽  
Linear Arrangement ◽  
Continuous Growth ◽  
Laser Surface Alloying ◽  
Crystal Grains

Dendritic compounds usually have a bad effect on the mechanical properties of engineering materials. In this study, the microstructure and the growth model of TiC crystals fabricated by laser surface alloying of pure titanium are investigated by means of SEM, EMPA and TEM. Dendritic TiC develops into primary truck by the model of continuous growth at the beginning of solidification and thus the surfaces of the primary truck that are suited to grow laterally develop fully by the model of spiral growth to form a second branch with a faceted surface. Hence the final morphology of dendritic TiC looks like it consists of tiny crystal grains in a linear arrangement.

Sign in / Sign up

Export Citation Format

Share Document