Columnar to equiaxed grain transition of laser deposited Ti6Al4V using nano-sized B4C particles

In this study, to evaluate the effect of boron carbide (B4C) addition on the wear performance of aluminum (Al), Al6061 and 5, 10, and 20 vol.% B4C/Al6061 composites were manufactured using the stir casting and hot rolling processes. B4C particles were randomly dispersed during the stir casting process; then, B4C particles were arranged in the rolling direction using a hot rolling process to further improve the B4C dispersion and wear resistance of the composites. Furthermore, a continuous interfacial layer between B4C and the Al6061 matrix was generated by diffusion of titanium (Ti) and chromium (Cr) atoms contained in the Al6061 alloy. Wear depth and width of the composites decreased with increasing B4C content. Furthermore, with B4C addition, coefficient of friction (COF) improved as compared with that of Al6061. The results indicate that interface-controlled, well-aligned B4C particles in the friction direction can effectively increase the wear properties of Al alloys and improve their hardness.

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Optimization of Al Matrix Reinforced with B4C Particles

JOM ◽

10.1007/s11837-012-0502-2 ◽

2012 ◽

Vol 65 (2) ◽

pp. 272-277 ◽

Cited By ~ 11

Author(s):

Mohsen Ostad Shabani ◽

Ali Mazahery

Keyword(s):

B4c Particles ◽

Al Matrix

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Unlocking the cavitation erosion-corrosion resistance of a TiCN nanocrystalline coating with an equiaxed grain structure

Corrosion Science ◽

10.1016/j.corsci.2021.109978 ◽

2021 ◽

pp. 109978

Author(s):

Shuang Peng ◽

Jiang Xu ◽

Shuyun Jiang ◽

Zong-Han Xie ◽

Paul Munroe

Keyword(s):

Corrosion Resistance ◽

Cavitation Erosion ◽

Grain Structure ◽

Nanocrystalline Coating ◽

Erosion Corrosion ◽

Equiaxed Grain

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Microstructure and tensile behaviour of B4C particles reinforced Al6061 matrix composites

Materials Today Proceedings ◽

10.1016/j.matpr.2021.11.188 ◽

2021 ◽

Author(s):

T.N. Kavitha ◽

V. Auradi ◽

G.L. Rajesh ◽

V. Bharath ◽

S. Mahendra Kumar ◽

...

Keyword(s):

Tensile Behaviour ◽

Matrix Composites ◽

B4c Particles

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The Effect of Heat Treatment on Microstructure and Performance of Die Forging Copper

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.690-693.58 ◽

2013 ◽

Vol 690-693 ◽

pp. 58-61

Author(s):

Gui Rong Yang ◽

Wen Ming Song ◽

Ying Ma ◽

Yuan Hao

Keyword(s):

Heat Treatment ◽

Dislocation Density ◽

Electric Conductivity ◽

Annealing Treatment ◽

Technical Parameter ◽

Copper Specimen ◽

Die Forging ◽

And Performance ◽

Equiaxed Grain ◽

Microstructure And Performance

The copper specimen was fabricated through liquid die forging under optimum technical parameter, and the die forging copper was annealed under different conditions. The effect of annealing treatment on the microstructure, strength, hardness and electric conductivity of die forging copper was investigated. The results show that the microstructure of die forging copper was changed into equiaxed grain when the treating temperature was less than 250 °C and treating time was less than 2.0 h. The restoration and recrystallization happened during treatment and the obtained crystal grain size became smaller. The strength of die forging copper decreased after annealing treatment owing to the decreasing of dislocation density and concentration of supersaturated vacancy. The hardness of die forging copper also dropped to some extent. The electric conductivity of die forging copper was increased by 5.2% after annealing treatment because the concentration of supersaturated vacancy and dislocation density was decreased obviously.

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Microstructure Evolution of Copper by Three Roll Planetary Milling

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.279.44 ◽

2018 ◽

Vol 279 ◽

pp. 44-48 ◽

Cited By ~ 2

Author(s):

Yu Wei Zhou ◽

Ze Ning Mao ◽

Ying Liu ◽

Jing Tao Wang

Keyword(s):

Dynamic Recrystallization ◽

Pure Copper ◽

Milling Process ◽

Planetary Mill ◽

Grain Structure ◽

Coarse Grain ◽

Engineering Strain ◽

Fine Grain ◽

Equiaxed Grains ◽

Equiaxed Grain

The microstructure of commercial pure copper TP2 tube by three roll planetary mill processing was investigated. Due to work hardening and subsequent softing by dynamic recrystallization during milling process,the coarse grain structure of the copper transformed to fine grain structure. The grain refinement is achieved along the axial moving in general; in the reducing zone, the sample has a gradient structure along the radial direction; uniform equiaxed grain with size of ~2 μm could be obtained at the outlet. The initiation of dynamic recrystallization occurred in the three roll planetary mill the reduction engineering strain reach ~30%, where some equiaxed grains replaced the elongated grains because of recrystallization.

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Investigation of mechanical properties on Al 6061-B4C composite by squeeze casting process technique

International Research Journal of Multidisciplinary Technovation ◽

10.34256/irjmt1915 ◽

2019 ◽

Vol 1 (1) ◽

pp. 38-48

Author(s):

A. Sathishkumar ◽

Gowtham A ◽

M. Jeyasuriya ◽

S. DineshBabu

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Metal Matrix ◽

Squeeze Casting ◽

Casting Process ◽

Weight Fraction ◽

Squeeze Pressure ◽

B4c Particles ◽

Engineering Industries ◽

Squeeze Casting Process

Aluminum alloy is widely used in automotive, aerospace and other engineering industries because of its excellent mechanical properties. The main objective is to enhance 6061 Al alloy’s mechanical properties by producing 6061-B4C composite through squeeze casting process. Experimentation was carried out with different micron sizes and weight fraction of B4C particles. The mechanical properties of reinforced metal matrix were experimentally investigated in terms of Ultimate Tensile Strength and Hardness. We observe that these two properties are improved by the reinforcement of B4C particles and applied squeeze pressure.

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Effect of In-Situ Synthesized Boride Phases on the Impact Behavior of Iron-Based Composites Reinforced by B4C Particles

Metals ◽

10.3390/met10050554 ◽

2020 ◽

Vol 10 (5) ◽

pp. 554

Author(s):

Fehmi Nair ◽

Mustafa Hamamcı

Keyword(s):

Contact Forces ◽

Impact Behavior ◽

Iron Matrix ◽

Impact Tests ◽

B4c Particles ◽

Iron Based ◽

In Situ Reactions ◽

Boride Phases ◽

The Impact

The objective of this study is to investigate the impact behavior of iron-based composites reinforced with boron carbide (B4C) particles and in-situ synthesized iron borides (Fe2B/FeB). The composite specimens (Fe/B4C) were fabricated by hot-pressing under a pressure of 250 MPa at 500 °C, and sintered at a temperature of 1000 °C. The effects of the reinforcement ratio on the formation of in-situ borides and impact behavior were investigated by means of different volume fractions of B4C inside the iron matrix: 0% (un-reinforced), 5%, 10%, 20%, and 30%. Drop-weight impact tests were performed by an instrumented Charpy impactor on reinforced and un-reinforced test specimens. The results of the impact tests were supported with microstructural and fractographical analysis. As a result of in-situ reactions between the Fe matrix and B4C particles, Fe2B phases were formed in the iron matrix. The iron borides, formed in the iron matrix during sintering, heavily affected the hardness and the morphology of the fractured surface. Due to the high amount of B4C (over 10%), porosity played a major role in decreasing the contact forces and fracture energy. The results showed that the in-situ synthesized iron boride phases affect the impact properties of the Fe/B4C composites.

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