Mohammad Salim Kaiser
Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh

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Wear Behavior of Commercial Tire Rubber against Mild Steel in Dry, Wet and 3.5% NaCl Corrosive Environment Samiul Kaiser; Mohammad Salim Kaiser; Sheikh Reaz Ahmed
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 5 No. 1 (2020)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v5i1.10428

Abstract

The tribological performance of commercially used tire rubber was evaluated at ambient conditions under dry, wet and 3.5% NaCl corrosive environment. A pin-on-disc apparatus was used for the experiment. Applied load of 2.5N at sliding velocity of 0.246 ms-1 distance ranging from 75m-2650m were used for this study. The results showed that the nature of the wear rate was similar in all environments as initially increases afterwards decreases to more or less a constant value. Moreover, the wear rate in dry environment was significantly higher than that of wet and corrosive environment. Water tends to lubricate the contact, reduce the heat generation as well as for sealing effects thus the wear rate is reduced. Coefficient of friction in wet and corrosive environment showed the lower value due to sealing and lubricating effect between the particles. The damage behaviors of worn surfaces were analyzed by optical microscope and SEM. At dry sliding condition greater voids and holes are observed.
Fractional Recrystallization Behavior of Impurity-Doped Commercially Pure Aluminum Mohammad Salim Kaiser
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 5 No. 2 (2020)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v5i2.11675

Abstract

This manuscript reports the effects of trace impurities on the fractional recrystallization behavior of commercially pure aluminum. To allow the recrystallization cold rolled by 75% alloy samples are annealed isothermally at 700ºK for different time up to 60 minutes. Recrystallization kinetics is evaluated from the micro hardness variation of the different annealed samples. The JMAK type analysis is also used to study the recrystallization behavior as well as to observe the correlation with the experimental results. The behavior of the fraction recrystallization between two methods the trace impurities added alloys is evidence for the higher variation as to form GP zones and metastable phases during annealing. Higher addition shows the more variation as the formation of higher fraction phases. The microstructural study reveals that annealing at 700ºK for 30 minutes the alloys attain almost fully re-crystallized state.
Electrochemical Corrosion Properties of Ternary Al and Quaternary Zr Added Bell Metal in 0.1M NaCl Solution Sakib Al Razi Khan; Mohammad Ashfaq Hossain; Maglub Al Nur; Mohammad Salim Kaiser
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 5, No 1 (2021)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v5i12021p001

Abstract

The electrochemical corrosion property of ternary Al and quaternary Zr added Bell metal in 0.1M Sodium Chloride solution has been experimentally conducted at room temperature. Electrochemical impedance spectroscopy (EIS) method and Potentiodynamic polarization technique are used to carry out the electrochemical investigation. Microhardness test is also conducted for all three alloys and it reveals that Al addition increases the hardness of bell metal due to the formation of different intermetallic precipitates of Cu and Al. Optical Micrograph as well as Scanning Electron Micrograph have also been studied to characterize their surface condition. It is found that Zr addition refines the grain structure of the alloy and results in increase of hardness. The EIS study reveals that the corrosion resistance is seem to be augmented with the addition of ternary Al and quaternary Zr to bell metal. The potentiodynamic polarization curves disclose that both ternary Al added and quaternary Zr added alloy show better corrosion performance than the base bell metal alloy due to the formation of stable aluminium oxide film. The currentdensity (Icorr) of base bell metal showed higher value than both ternary Al added and quaternary Zr added bell metal alloys. The corrosion potential (Ecorr) and the open circuit potential (OCP) were seen to be moved to the more positive direction for the Al and Zr added alloys. Microstructure and SEM study of the alloys after corrosion revealed a formation of an oxide film on the surface of the ternary A and quaternary Zr added alloys, the probable cause of which is the presence of Al in the respective alloys.
Surface Quality of Fe, Ni and Cr added Hyper-eutectic Al-Si Automotive Alloys under Up-milling and Down-milling Operation Akib Abdullah Khan; Mashiur Rahman Shoummo; Mohammad Salim Kaiser
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 6, No 1 (2022)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v6i12022p009

Abstract

Effect of the elements Fe, Ni, and Cr on the surface quality under machining of hyper-eutectic aluminium-based Al-Si automotive alloys has been carried out as the elements improve the properties of this alloy. Machining is done on a horizontal type milling machine using a high-speed steel slab milling cutter in dry condition. Only the cutting speed varies throughout the experiment, while the machining feed and depth of cut remain fixed. The experimental results show that the addition of these alloying elements increases the roughness and hardness specially due to formation of Fe-rich intermetallic . However, the needle-like  has been refined with the addition of Cr, as seen by the microstructure. The SEM fractography shows a huge cleavage of the brittle  phase, which initiates the crack propagation for Fe added alloys. The downward force causes compressive stress exerted in down-milling operation, so the results depict higher hardness and better surface finish.  Besides, shorter chips are formed in down-milling than up-milling process, which rather causes the brittleness of the alloys. When the cutting speed is raised, the surface quality deteriorates due to high temperature, while the hardness improves initially due to formation of precipitates then decreases due to coarsening of precipitates.