scholarly journals Understanding the effect of Ni content on microstructure and mechanical properties of A384 HPDC alloy

2022 ◽  
Vol 896 ◽  
pp. 163111
Hüseyin Demirtaş ◽  
Erdem Karakulak ◽  
Nadendla Hari Babu
D. H. A. Besisa ◽  
Z. I. Zaki ◽  
A. M. M. Amin ◽  
Y. M. Z. Ahmed ◽  
E. M. M. Ewais

In attempts to attain a SHS synthesized TiC‒Al2O3 composite with high density, homogenous microstructure and extra mechanical properties for using in aggressive media, addition of different reinforcements have to be studied and inspected. In this work, ductile nickel metal powder with different content (5‒20 wt. %) and 1 mole fraction dilution of alumina and zirconia with and without Ni addition are introduced to TiC‒Al2O3 ceramic and synthesized by combined self-propagating high temperature synthesis (SHS) and direct consolidation (DC) technique. The influence of nickel wt. % and dilution with zirconia and alumina on the phase composition, densification behavior, microstructure and mechanical properties of SHS synthesized TiC‒Al2O3 composite has been investigated and analyzed. Results revealed that, addition of 5 wt. % Ni gave the best densification behavior, microstructure and mechanical properties with exact formation of the target composite of TiC‒Al2O3. However, increasing Ni content higher than 5 wt % and dilution with zirconia and alumina led to disturbing the chemical reactions between the starting precursors, drooping and deterioration in density, microstructure and mechanical properties. Accordingly, this study suggests the addition of 5 wt. % Ni for a highly dense TiC‒Al2O3 composite with homogenized morphology and unparalleled mechanical properties. Moreover, the different investigated characteristics of the produced composites nominate it strongly to be used successfully in aggressive and tribological applications.

2012 ◽  
Vol 727-728 ◽  
pp. 305-309 ◽  
Ana Lúcia Diegues Skury ◽  
Guerold Sergueevitch Bobrovinitchii ◽  
Marcia G. de Azevedo ◽  
Sérgio Neves Monteiro

In the production of metallic saw blades segments impregnated with diamond particles, there are two basic functions of the metal-based matrix. First, to hold tightly the particles and, second, to display wear rate compatible with the diamond loss. The most common matrix materials are composed of either cobalt or iron, nickel, copper, bronze alloys and tungsten alloys. This paper investigated the microstructure and mechanical properties of Ni-Fe-Cu-Sn alloys as the metallic matrix of saw blade segments. It was found that the Ni content significantly influences the microstructure and mechanical properties of the alloy. Information on the diamond bonding efficiency of the Ni-Fe-Cu-Sn alloy as a cutting tool matrix were disclosed.

2020 ◽  
Vol 46 (7) ◽  
pp. 8754-8760 ◽  
Wenyan Zhai ◽  
Bowei Pu ◽  
Liang Sun ◽  
Hui Dong ◽  
Yiran Wang ◽  

2016 ◽  
Vol 849 ◽  
pp. 295-301 ◽  
Yan Feng Li ◽  
Xue Feng ◽  
Xun Jun Mi ◽  
Xiang Qian Yin ◽  
Xiao Yu Kang

The microstructure and mechanical properties of TiNiFe alloys with different compositions was investigated by tensile test, X-ray diffraction, EBSD, SEM, and TEM. The results indicated that tensile strength rapidly increased with increasing Ni content. In addition, Ti2(Ni,Fe) particles were observed in the TiNiFe alloys, which affected the mechanical properties. Increasing the content of Ni had little influence on the grain size of TiNiFe alloys. With the replacement of Ni by Fe, the lattice constant of TiNiFe alloys decreased as the Ni content increased.

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