1. Make a list of metals that would be suitable for a (1) paper clip, (2) bicycl
ID: 1718844 • Letter: 1
Question
1. Make a list of metals that would be suitable for a (1) paper clip, (2) bicycle frame, (3) razor blade, (4) battery cable, and (5) gas-turbine blade. Explain your reasoning. Please only select two out of the 5 product above (you can do more if you want). In the selection of materials for these applications, the particular requirements that are significant to these components are briefly outlined as follows respectively: (1) paper clip -- Yield stress, elastic modulus, corrosion resistance. (2) bicycle frame -- Strength, toughness, wear resistance, density. (3) razor blade -- Strength, resistance to corrosion and wear. (4) battery cable -- Yield stress, toughness, elastic modulus, corrosion resistance, and electrical conductivity. (5) gas-turbine blade. -- Strength, creep resistance, resistance to various types of wear, and corrosion resistance at high temperature. Students are encouraged to suggest a variety of metals and discuss the relative advantages and limitations with regard to particular applications. Welcome to search information online but need to cite your sources.
Explanation / Answer
one of the most steels used in the manufacture of paper clip is galvanized steel This material does not rust, and the thickness of the wire promotes sturdy shapes. A clip machine wire is formed in the clip design of a three curve known as the gem shape. Some steel clips are plastic coated for design purposes colors.
the mechanical properties depend on the characteristics of the steel fence galvanize, other materials such as copper, brass and bronze, are softer than steel but are still capable of being ideal paperclips. Most likely, clip metal alloy coated in plastic.
within the steel used have SAE 1010 steel which is a low alaecion caero with the following characteristics
E resistecia tensile: 392.3 Mpa
Limit of tensile: 292 Mpa
Brinell hardness: 109
high hardness due to zinc coating
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b)
These are the factors you should consider when choosing the material of your bike.
Be reasonably light.
Absorb the shocks of the road or trail.
Be rigid, not to strip with pedaling.
Be durable and resist corrosion.
Be resistant to material fatigue, shock, impact and twisting forces.
Have a price in line with your budget.
Steel, aluminum, titanium, carbon fiber and bamboo meet these criteria, but each is different in terms of strength, stiffness, weight, fatigue resistance, durability and of course price.
aluminum
E= 70 Gpa
Sflux=250 Gpa
resistant corrocion
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Razor blade
Carbon Steel: is the most common type of steel for its effectiveness for shaving. Creates a very sharp and very effective edge. Their only disadvantage is its vulnerability to oxidation, which must be removed by carving with sandpaper, an abrasive or metal polish.
Stainless steel: stainless steel knives are harder to sharpen, but retain their sharpness longer, plus they do not develop rust very easily.
E resistecia tensile: 221 Gpa
Limit of tensile: 228 Mpa
hardness=4,84 H
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within various types of materials for manufacturing batteries have
Zinc coal General
General alkaline manganese
Mercury oxide button Hearing aids and photographic equipment.
Silver oxide
Zinc Air hearing devices. It was developed to replace the mercuric oxide battery used in hearing aids.
Lithium watches and photographic equipment, memory support systems, industrial and military applications.
Nickel-cadmium portable electrical tools, video cameras, cell phones, security devices, emergency lighting, medical equipment. Also in satellites that are in orbit around the Earth. Most common and most used: About 80% of batteries are rechargeable Nickel Cadmium (Ni-Cd). They can be recharged hundreds of times, slowly or very quickly.
lithium-ion high-tech products: terminals for laptop computers and cell phones, where the important thing is the small size, high power capacity with low discharge rate. It is the newest technology that has incorporated the battery industry. Esconsiderablemente process more complicated than the Ni-Cd or Ni-MH recharge, and requires recharging system much more expensive.
nickel-metal hydride products which are important high energy capacity or a small physical size. (Laptop computers, camcorders celularesy).
Sealed lead acid Electro-portable, toys, emergency lights, energy supply and telecommunications continuopara alarm systems, solar systems, etc.
Only alkaline rechargeable NiCd compete with low consumption applications (laptops and notebooks, cellular)
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the materials used in the blades for gas turbines should have the following properties
Mechanical strength.
Ductility. restriction thermal stresses.
Stability of the microstructure (grain size growth).
Corrosion resistance at elevated temperatures.
Thermal conductivity. thermal stress by temperature gradient.
labyrinthine gasket austenitic stainless in TS.
Mobile blades titanium alloys with high specific strength, corrosion resistance and fatigue strength. For example 6% Aluminium, 4% Vanadium Titanium rest
vanes or turbine nozzle erosion, oxidation and thermal shock cracking failure. For these causes of failure are ideal cobalt alloys (21% Cr, W 7%, rest Cobalt).
Blades: added to the above mechanical stress. Similar alloys and nickel based (Nimonic: Cr 15% Co 15% Mo 3.5% Ti 4% Nickel rest).
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