Effect of Cobalt content on mechanical properties of Al-Si alloy

2014 ◽  
Vol 2 (1) ◽  
pp. 46-58
Author(s):  
Maryam A. B.
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Wear Rate ◽  
Room Temperature ◽  
Cobalt Content ◽  
Stir Casting ◽  
Fish Bone ◽  
High Load ◽  
Micro Hardness ◽  
Casting Method

       This work encompasses studying the effect of different contents of Co on Al-Si alloy with Sb modification prepared by stir casting method. The content of Co is varying from 0 to 1.2wt%, The effect of Cobalt on microstructure, micro hardness, tensile strength and wear rate were studied extensively. The results show that the intermetallic compounds was increased with the increasing of Cobalt content .The Co-bearing compounds presented as small block shape at first and gradually turned into dendrite or fish bone shape. The addition of Co has appositive effect on tensile strength of the Al-Si alloys that used in the current research, the maximum tensile strength was (177MPa) when Co content was 0.9%Co at room temperature as well as wear rate were studied in this paper and noticed that the addition at 0.9%Co had the better effect at low and high load(5N),(10N).

scholarly journals Effects of Austempering on the Microstructure, Corrosion and Mechanical Properties of AISI 1018 Steel

2021 ◽  
Author(s):  
Oluwole Daniel Adigun ◽  
Muyideen Adebayo Bodude ◽  
Aanuoluwapo Rebecca Adigun ◽  
Babatunde Abiodun Obadele ◽  
Abdullahi Olawale Adebayo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Impact Energy ◽  
Room Temperature ◽  
Low Carbon Steel ◽  
Salt Bath ◽  
Isothermal Transformation ◽  
Low Carbon ◽  
Micro Hardness ◽  
Microstructural Investigation

Abstract In this study, the effects of austempering on the microstructure, mechanical properties (micro hardness, impact energy and tensile strength) and corrosion behaviours of AISI 1018 low carbon steel were evaluated. The steel specimens were subjected to heat treatment by austenitizing at 830°C, maintained in this condition for 90 min before rapid cooling in a NaNO3 salt bath sustained at 300°C for isothermal transformation for additional 50 min and finally allowed to air cool to room temperature. The as-received and the austempered samples were tested for corrosion in both 0.5M aqueous acidic (HCl) and 0. 5M alkaline (NaOH) media. Microstructural investigation using scanning electron microscope (SEM) reveals transformation from ferrite/pearlite phases to bainite over the austempering process. Interestingly, significant improvements of 15.7% to 95.7% in the various mechanical properties (micro hardness, impact energy and tensile strength) and corrosion resistance in both media were observed.

scholarly journals FTIR spectroscopy characterization and critical comparison of poly(vinyl)alcohol and natural hydroxyapatite derived from fish bone composite for bone-scaffold

2021 ◽  
Vol 2120 (1) ◽  
pp. 012004
Author(s):  
May Teng Hooi ◽  
Siew Wei Phang ◽  
Hui Ying Yow ◽  
Edmund David ◽  
Ning Xin Kim ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Vinyl Alcohol ◽  
Fish Bone ◽  
Poly Vinyl Alcohol ◽  
Solution Casting ◽  
Casting Method ◽  
Elongation At Break ◽  
Solution Casting Method ◽  
Extrusion Method

Abstract This paper presents the interaction comparison of poly(vinyl) alcohol (PVA) with hydroxyapatite derived from Spanish Mackerel (SM) and Whitefin Wolf Herring (WWH) bones, in different processing method. PVA filament and solution casting method illustrated higher crystallinity in the FTIR graph as compared to the PVA pellet and filament extrusion method. Besides, minimal interactions between PVA with glycerol and HAp was observed as well. PVA pellet and solution casting method portrait higher interaction as compared to the PVA filament and extrusion method. As for the HAp of SM and WWH, WWH had higher crystallinity and better cell adhesion with a higher Ca/P ratio while SM had relatively better mechanical strength with Ca/P ratio near to stoichiometric value. The loading of HAp (0, 2.5, 5, 10, 20, 30%) does not affect interactions of PVA/HAp composite in FTIR, and thermal properties in TGA. However, it caused an increase in crystallinity at low HAp loading and decreased at higher loading of HAp above 10%. Upon addition of HAp, tensile strength increased and elongation at break decreased. As the loading of HAp increased, both mechanical properties decreased. Scaffold with WWH composite possessed lower tensile strength and higher elongation at break than SM composite. The result of mechanical properties corresponded to the SEM result. ANOVA analysis justified the effect of HAp variations and loading on the mechanical properties of the composite was prominent.

scholarly journals Effect of Feeding Technique in Mechanical Behaviour of Sic/Tio2 Reinforced AA 6082 Composites

2019 ◽  
Vol 8 (3) ◽  
pp. 8233-8236
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Stir Casting ◽  
Homogeneous Distribution ◽  
Micro Hardness ◽  
Casting Technique ◽  
Feeding Technique ◽  
Normal Feeding ◽  
Feeding Process ◽  
Effect Of Feeding

In this study, SiC and TiO2 nanoparticles reinforced AA 6082 composites were prepared by stir casting technique. The optimized quantities of reinforcement particles used in composites was 6 Wt.%. The mechanical properties such as tensile strength, compressive strength and hardness of prepared composites were improved significantly about with novel multi-encapsulate feeding as compared normal feeding technique. Also, the drastic improvement was noted with microstructure in order to form of health clusters and homogeneous distribution under novel feeding than normal feeding. The testing shows that the micro hardness and tensile strength was improved about 10% and 5% than normal feed process. Lesser blow holes and good matrix materials dispersion was found in multi encapsulate feeding process. From this experimentation, it was confirmed that multiple encapsulate feeding of reinforcement particles can increase the mechanical strength and microstructure properties than normal feed technique.

Characterization of Al-Si-Mg/Al2O3 Nanocomposite Produced by Stir Casting Method

2015 ◽  
Vol 827 ◽  
pp. 294-299 ◽  
Author(s):  
Anne Zulfia ◽  
J. Salahuddin ◽  
Hafeizh E. Ahmad
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Volume Fraction ◽  
Stir Casting ◽  
Nano Particles ◽  
Nano Particle ◽  
Casting Method ◽  
Porosity Level

Al-Si-Mg reinforced with Al2O3 nano particles have been made by stir casting method. The vortex produced by stirrer is to distribute the Al2O3 nano particles in the molten aluminium. The volume fraction of Al2O3 nano particles was varied from 0.5, 1, 2, 3, to 5 Vf%, while the addition of magnesium was 3 Vf% as wetting agent to improve the wettability between Al2O3 nano particle and Al-Si-Mg matrix. The effect of Al2O3 on characteristic of Al-Si-Mg composites was studied. It is found that the presence of Al2O3nano particle led to significant improve in mechanical properties, especially at addition of 0.5 Vf% Al2O3. The ultimate tensile strength reached to 154 MPa with 10.24 % elongation, while the hardness reached to 37.7 HRB followed by decrement in wear rate. The porosity level tend to increase with increasing of Al2O3 and caused decrement in mechanical properties.

Material Characterization Study on Aluminium Metal Matrix Composites by Enhanced Stir Casting Method

2014 ◽  
Vol 984-985 ◽  
pp. 326-330
Author(s):  
T.M. Chenthil Jegan ◽  
D. Ravindran ◽  
M. Dev Anand
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Tensile Strength ◽  
Boron Carbide ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Stir Casting ◽  
Aluminium Matrix ◽  
Matrix Composites ◽  
Casting Method

Metal Matrix Composites possesses high mechanical properties compared to unreinforced materials. Aluminium Matrix Composites (AMC) is attracted in the emerging world because of its low cost, less weight and enhanced mechanical properties. In the present study the enhancement in mechanical properties like hardness and tensile strength of AMCs by reinforcing AA 6061 matrix with silicon carbide (SiC) and boron carbide (B4C) particles are analyzed. By enhanced stir casting method aluminium matrix was reinforced with boron carbide particulates and silicon carbide particulates with the various weight percentage of 2.5 %,5% and 7.5%.The tensile strength and hardness was found to increase with the increase in wt% of the reinforcement. From the analysis it is observed that the mechanical property of B4C reinforced AMC is significantly good compared to SiC reinforced AMC.

Effect of Nd Content on the Microstructures and Mechanical Properties of As-Cast Mg15Al-xNd Alloys

2010 ◽  
Vol 146-147 ◽  
pp. 1004-1008
Author(s):  
Hong Xia Wang ◽  
Wei Liang ◽  
Guo Yin Xie ◽  
Chun Xiang Xu
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Room Temperature ◽  
Casting Method ◽  
Mg17al12 Phase ◽  
Microstructures And Mechanical Properties ◽  
Mould Casting

Mg15Al-xNd (x=0, 0.5, 1.0, 1.5, 2.0and 4.0wt.%) alloys were prepared by metal mould casting method and the microstructures and mechanical properties were investigated. The results demonstrate that primary α-Mg grain is significantly refined with the addition of Nd element in Mg15Al alloy, and the best refinement is reached at 1.0wt.%Nd content. Further increasing Nd content leads to the coarsening of primary α-Mg grains. The added Nd element is also the reason of the refined eutectic β-Mg17Al12 and increased dispersion. The β-Mg17Al12 phase is thoroughly changed from fibrous coupled eutectic into divorced eutectic when Nd content reaches 1.5wt.%. Al11Nd3 phase is formed when the addition of Nd reaches to 1.0wt.% and Al2Nd phase emerges in the microstructure with increasing Nd content up to 4.0wt%. Addition of Nd element significantly improves the mechanical properties of Mg15Al alloy at room temperature. The best tensile strength and elongation is achieved by adding 1.0wt% Nd into Mg15Al alloy.

scholarly journals A Study On Effect of SiC And OFHC Cu-Fe29Ni17Co Reinforcement With AA7075 On Microstructure, Mechanical And Wear Rate of Hybrid Composites

2021 ◽  
Author(s):  
Ramasubbu Narasimmalu ◽  
Ramabalan Sundaresan
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Wear Rate ◽  
Hybrid Composites ◽  
Matrix Alloy ◽  
Stir Casting ◽  
Wear Behaviour ◽  
Sic Reinforcement

Abstract The silicon carbide (SiC) reinforcement with aluminium alloy 7xxx series has been found to be limited value as per the mechanical properties and wear behaviour of previous studies. In order to improve limited mechanical properties of hybrid aluminium metal matrix composites, the SiC and OFHC Cu-Fe29Ni17Co reinforcement has been added with AA7075 alloy. Hence, the AA7075/SiC/Cu-Fe-Ni hybrid composites have been fabricated through a stir casting route under different weight percentages of SiC reinforcement. The mechanical properties such as hardness, compressive strength, tensile strength and wear rate have been investigated. The micro structure of hybrid composites found that the reinforcement particles in matrix alloy have been evenly spread. The silicon carbide and Cu-Fe-Ni alloy in aluminium solid solution has been found as well bonded interfacial reactions. The hardness, tensile strength, yield strength, compressive strength and wear rate were improved by 23.9 %, 48 %, 47 %, 15.3 % and 70 % for hybrid composite by adding 15 wt. %SiC and 15 wt. % Cu-Fe-Ni with AA7075 alloy, compared to matrix alloy.

scholarly journals Investigations on Mechanical Behavior of Al6061-TiO2-SiC Produced by Stir Casting

2018 ◽  
Vol 7 (3.34) ◽  
pp. 369
Author(s):  
Nagendran N ◽  
Shanmuganathan V K ◽  
Gayathri N ◽  
Suresh K ◽  
Aravindh S ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Stir Casting ◽  
Mechanical And Thermal Properties ◽  
Matrix Composites ◽  
Casting Method ◽  
Structural Applications

Fine mechanical and thermal properties of metal matrix composites make them more demanding in various fields such as automotive, aerospace and structural applications. In this paper an effort has been made to fabricate a metal matrix composite, Titanium-di-oxide and silicon carbide reinforced in Al 6061 matrix using stir casting method. The reinforcements were added in 2%, 4% and 6% of weight to Al6061 to fabricate the metal matrix composite. Castings were machined and the specimens were prepared for various testing. Mechanical properties such as tensile strength, hardness, and corrosion analysis were studied for various compositions of reinforcements. And then the reinforcement was analyzed and studied for the improvement of mechanical properties in the material.  

The Role of Al2O3 Particles on Mechanical Properties and Microstructure of Aluminum A356 Composites Produced by Stir Casting Method

2020 ◽  
Vol 1000 ◽  
pp. 185-192
Author(s):  
Hanuna Haritsa ◽  
Muhammad Wira Akira ◽  
Anne Zulfia Syahrial
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Spinel Phase ◽  
Stir Casting ◽  
Reinforced Composites ◽  
Interface Area ◽  
Casting Method ◽  
Al2o3 Particles

This study was conducted to investigate the effect of Al2O3 on characteristics of A356 reinforced composites. The addition of Al2O3 as reinforced varied from 2 vf-% to 15 vf-% through Stir Casting methods to obtain the optimum addition Al2O3 as reinforced in mechanical properties of composite A356 as matrix and Al2O3 as reinforcement. Magnesium with of 10 wt-% was added to improve wettability between Al2O3 particles and Al A356. Addition of Magnesium is expected to form the spinel phase MgAl2O4 in interface area between Al2O3 and Al A356.The optimum tensile strength was found at 2 vf- Al2O3 with value 131.55 Mpa. However, the value is still lower than the tensile strength of Al A356 As cast. It is caused due to the porosity and the agglomeration of Al2O3 were found in the microstructure of the composite Al A356/Al2O3. The Hardness increased from material monolithic Al A356 as cast, reached 37.43 HRB.

scholarly journals Effects of Substitution of Y with Yb and Ce on the Microstructures and Mechanical Properties of Mg88.5Zn5Y6.5

Metals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 31
Author(s):  
Hongxin Liao ◽  
Taekyung Lee ◽  
Jiangfeng Song ◽  
Jonghyun Kim ◽  
Fusheng Pan
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Yield Strength ◽  
Creep Resistance ◽  
Room Temperature ◽  
High Thermal Stability ◽  
Long Period ◽  
Microstructures And Mechanical Properties

The microstructures and mechanical properties of the Mg88.5Zn5Y6.5-XREX (RE = Yb and Ce, X = 0, 1.5, 3.0, and 4.5) (wt.%) alloys were investigated in the present study. Mg88.5Zn5Y6.5 is composed of three phases, namely, α-Mg, long-period stacking ordered (LPSO) phases, and intermetallic compounds. The content of the LPSO phases decreased with the addition of Ce and Yb, and no LPSO phases were detected in Mg88.5Zn5Y2.0Yb4.5. The alloys containing the LPSO phases possessed a stratified microstructure and exhibited excellent mechanical properties. Mg88.5Zn5Y5.0Ce1.5 exhibited the highest creep resistance and mechanical strength at both room temperature and 200 °C, owing to its suitable microstructure and high thermal stability. The yield strength of Mg88.5Zn5Y5.0Ce1.5 at room temperature was 358 MPa. The ultimate tensile strength of Mg88.5Zn5Y5.0Ce1.5 at room temperature and 200 °C was 453 MPa and 360 MPa, respectively.

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