iKnow

Resonance Effect in Chatter Formation in Metal Cutting New
Research Output | Dar Al-hikmah Library | IIUM Only

Machine tool chatter is a type of intensive self-excited vibrations of individual components of Machine-Tool-Fixture-Work (MTFW) system. Chatter causes unwanted excessive vibratory motion in between the tool and the work-piece causing adverse effects on the product quality and machine-tool and tool life. In addition to the damage of the work-piece

Comparison of Machinability of Ceramic Insert in Room Temperature and Cryogenic Cooling Conditions During End Milling Inconel 718 New
Research Output | Dar Al-hikmah Library | IIUM Only

Nickel based super alloy or Inconel 718 is known as heat resistant alloys which they are primarily used in gas turbine, steam turbine component and aircraft engine component construction [1]. Inconel 718 attained several unique combinations of properties like strength at elevated temperature, resistance to chemical degradation and wear resistance [

Machinability Aspects in Heat Assisted Machining of Hardened Steel Aisi H13 Using Coated Carbide Tool New
Research Output | Dar Al-hikmah Library | IIUM Only

AISI H13 tool steel is one of the major hardened materials used extensively for making hot working moulds and dies, because of favourable combination of their mechanical and thermal properties. However, these enhanced properties, especially high hardness make them very difficult to machine using conventional techniques. In the current project a tec

Role of the Frequency of Secondary Serrated Teeth in Chatter Formation During Turning of Carbon Steel Aisi 1040 and Stainless Steel New
Research Output | Dar Al-hikmah Library | IIUM Only

High metal removal rate with a desired quality of surface finish is the ultimate objective in machining, but it depends on a large number of factors, which include chip-tool interaction, cutting temperature, wear mechanism and wear rate, cutting force, chatter and dynamics behavior of the machine tool system. Chatter causes instability of the machi

The Effect of Cryogenic Cooling in Machinability of Stainless Steel During Turning New
Research Output | Dar Al-hikmah Library | IIUM Only

A high cutting temperature inherently characterizes high production machining. Such a high cutting temperature adversely effects tool life, dimensional and form accuracy and surface integrity of the product. Currently, an effort is being made to control this problem by reducing heat from the cutting zone through proper selection of machining parame

Implementation of High Speed of Silicon Using Diamond Coated Tools with Air Blowing New
Research Output | Dar Al-hikmah Library | IIUM Only

Ductile mode machining of silicon is hard to obtain due to the brittleness of silicon and hardness of tool materials. A brittle material will have little tendency to deform before it fractures when it is subjected to stress. Ceramic materials such as silicon carbide and silicon nitride are hard and brittle to be machined. According to Thimmaiah et

Wear Mechanism in End Milling of Inconel 718 New
Research Output | Dar Al-hikmah Library | IIUM Only

Nickel-based, creep-resistant, superalloy Inconel 718 is amongst the most difficult alloys to machine. The main reason for the poor machinability of the alloy is the high work-hardening rate by the precipitation of a γ’ phase and the presence of hard abrasive phases such as titanium carbide, niobium carbide and the Ni3AlTi phase. Generally, incr

Elimination of Burr Formation During End Milling of Polymethyl Methacrylate (Pmma) Through High Speed Machining New
Research Output | Dar Al-hikmah Library | IIUM Only

A burr is a raised edge or small pieces of material remaining attached to a workpiece after it has undergone machining. The Burr, Edge and Surface Technology (BEST) Division, the Society of Manufacturing Engineers defines a burr as “an undesirable projection of material that results from cutting, forming, blanking or shearing operation [1]. The f

High Speed End Milling of Single Crystal Silicon Wafer New
Research Output | Dar Al-hikmah Library | IIUM Only

Presently, silicon is the most important semiconducting material used in the electronic industry. Silicon has also found application in energy and mechanical application such as electro-optics and micro-electro mechanical system (MEMS) devices. The process of machining silicon requires high quality surface finish and is generally achieved through p

A Revisit to the Principles of Gharar in Bai al-Dayn and al-Inah New
Research Output | Dar Al-hikmah Library | IIUM Only

This paper discuss at length both contracts and the legal implications of the presence of gharar on the validity of these contracts.

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