For an aluminium alloy 6061, it has a tensile strength of about 310Mpa, however with the boron/6061 composite, the tensile strength grows to a huge 1417Mpa. Metal matrix composites usually exist in three slightly different forms. Continuous fibre reinforced MMCs, discontinuous and particulate reinforced. Continuous fibre types provide better tensile strength, however the disadvantage is they are more difficult and complex to produce and make. While the discontinuous ones are manufactured by powder metallurgy.
Due to the high strength to weight ratio, lighter blades allow sensitivity to minor wind movements and a rapid response to wind gusts. Besides, lighter blades require less robust turbine and tower components, so the whole cost savings decrease the additional cost of carbon fiber . However, this kind of cost saving is only effective on large wind turbines. On the contrary, the carbon fiber has disadvantages such as: low strain to failure, low impact resistance, high electrical conductivity and high cost. For the remote households or farms which need to use small wind turbines, the high cost of carbon fiber will increase the price of the whole wind turbine which is the biggest shortcoming.
The weak cutting edge du to the crate also contributes to the brittle failure. • Plastic deformation can also be a major contributor to wear mechanisms of cutting tool when machining titanium alloys • High compressive stresses and the development of high temperature close to the cutting edge causes plastic deformation of cutting edge • The tendency for chipping and micro fracture along the cutting edge increases with feed rate and cutting speed.
This is because if the additive starts to weaken due to the harmful polymer oxidation chemicals in the air then this could make the polymer properties to become brittle. Strength The antioxidants are very strong. They are made very strong so that they don’t break or get ruined due to polymer oxidation in the
Higher fuel economy helps consumers save money with gas prices going up all the time people want more efficient vehicles. Diesel vehicles can also be converted to bio-diesel which are made using vegetable oils. These bio-diesel vehicles have less emissions and run at a cheaper cost. Bio-diesel can cost any where from one to two dollars cheaper than gasoline. Diesel vehicles engines are proven to last longer because they they are built to withstand a more powerful explosion thus made with more robust parts, therefore retaining their value over time.
Diesel engines are better than gasoline engines because they last longer, have better fuel economy, and they are cheaper to maintain. Diesel engines got there humble beginnings in the 1900s as an alternate way to power large, stationary platforms. They became popular in the war years due
This can interlock/jam the screw conveyor resulting in bending and torque loads on the screw that eventually leads to the mechanical failure of the machine. 2. When designing an inclined screw conveyor system the most commonly estimated problems will encountered is that conveying efficiency will be reduced when the angle of inclination will increase. 3. For the inclined screw conveyor system the power requirement is higher than with other conveying system, this is due to the principle is based on friction.
The excellent wear resistance of D-type cold-work tool steels is the result of their high chromium (~12wt.%) and high carbon (1.5 to 2.35wt.%) contents. Generally, the high-carbon, high-alloy tool steels are particularly difficult to process by the conventional ingot metallurgy route. The main challenge is that the relatively slow cooling of the conventional static cast ingot allows the formation of coarse eutectic carbide structures, which are difficult to break down during hot working [1, ]. For overcoming these problems some new processing methods such as powder metallurgy (PM) and spray forming have been developed for production of the most highly alloyed tool steels, such as high-carbon, high-chromium (AISI D series) and high-speed (AISI T and M series) [1, , , ]. These techniques offer the possibility to produce steels with higher homogeneity, lack of segregations, finer microstructure and uniform d... ... middle of paper ... ... Li, Effect of Ca-Si agent modifier on the granulation of γ+(Fe,Mn)3C eutectic particle in an austenite steel, Journal of Materials Science, Vol.
The composition of material is then made according to the specific properties demanded. But, the properties also bring disadvantages on what process should be chose to manufacture the material so the composition of the material should be studied earlier before making any decision. The ease and economy with which INCONEL alloy 718 can be fabricated, combined with good tensile, fatigue, creep, and rupture strength, have resulted in its use in a wide range of applications. The examples of applications that use Inconel 718 as their mai... ... middle of paper ... ... CHAPTER 2 Literature Review 2.1 Introduction 2.1.1 Wire EDM Electrical Discharge Machine (EDM) is mainly used to cut a very intricate shape which other machines can’t do. Somehow, it’s only usable on the metal based product since electric is the main source for the cutting of product.
The primary disadvantages of the epoxy resins are that they require long curing times and, in general, their mould release characteristics are poor. The epoxy resins are characterized by their high adhesive strengths. This property is attributed to the polarity of aliphatic -OH groups and ether groups that exist in both the initial resin and cured system. The polarity associated with these groups promotes electromagnetic bonding forces between epoxy molecules and the polar fibres.