Presentation on theme: "Syllabus Elements of physical metallurgy of non-ferrous metals-classification, physical, chemical and mechanical properties of some important aluminium,"— Presentation transcript:
1 SyllabusElements of physical metallurgy of non-ferrous metals-classification, physical, chemical and mechanical properties of some important aluminium, titanium, copper and other important non-ferrous alloys.Heat treatment of some non-ferrous alloys and their applications
2 Non Ferrous Metals - Introduction Nonferrous metals and their alloys do not contain iron as a principle ingredient, although they may be present in small percentages.Non-Ferrous
3 Table 1: Some properties of commercially pure metals: Polmear (Eb153); Journal of Metals. 54 (2002) 42–48 and Steel World, 2 (1997) 59.
6 Table 2: The European car in 1990 Table 2: The European car in Total weight in 1985 was 815 kg, the increase being due to the introduction of enhanced passenger protection. The cost of accidents decreased from to million ECU’s from 1992 to 1995 respectively, in spite of an increase in the number of vehicles from 146 to 153 million (Source: OICA, Paris).
7 Materials used in the manufacture of a typical 2000 model year family sedan in North America. Journal of Metals, 54 (2002) 42–50.
9 Bare-aluminium overhead-conductors 99% pure Al(1XXX)For a given weight, pure aluminium has the highest conductivity than any element. Specific conductivity twice that of Cu.
10 Non Ferrous Metals - Properties Nonferrous metals such as copper, brasses, bronzes, aluminum, magnesium, nickel, chromium, titanium, lead, tin, zinc, gold, silver, platinum, the refractory metals, and their alloys are used in a wide variety of applications; each requiring specific characteristics. Metals such as aluminum and magnesium, for example, tend to be high-strength, lightweight, and corrosion-resistant. They offer advantages over other metals in applications which depend on their unique properties.Non-Ferrous
11 Non Ferrous Metals - Introduction Aluminum, beryllium, and titanium are used in structural applications.Light metals such as lithium, magnesium, potassium, and sodium have important engineering applications.Nickel and lead have widespread applications as does copper which is often chosen for its high thermal and electrical conductivity.Cadmium, tin, and zinc are often used as coatings, electrical applications and for bearing surfaces.Cobalt and manganese are common alloying elements in steels. Gold, silver, and platinum, the precious metals, are used in electrical applications and jewelry.Non-Ferrous
12 Non Ferrous Metals - Introduction Refractory metals have melting temperatures above 3600 degrees Fahrenheit (2000 degrees Celsius). Some of these approach 6200 degrees Fahrenheit (3500 degrees Celsius).They include such metals as iridium, osmium and ruthenium in addition to chromium, columbium, molybdenum, niobium, rhenium, tantalum, tungsten, and vanadium.Find use in applications requiring high strength, hardness, and thermal stability. For example, tool coatings, heat shielding, and other related uses.Non-Ferrous
13 Non Ferrous Metals - Properties Refractory metals are chosen for their high heat resistance. They retain their properties at elevated temperatures.Non-Ferrous
14 Metallurgy (Non Ferrous) Research Present and Futurewhat does industry need ?how can academia help ?what’s new (in aluminium !) ?Non-Ferrous
15 what does industry need ? composition + processing = attributesProduct attributes includecostgeometrypropertiesaestheticsAll attributes must be within specification otherwise you have no product !Non-Ferrous
16 what does industry need ? composition + processing = attributesalloychemistryfurnacechargingmeltingfurnacetreatmentgrainrefinementdegassingfiltrationlaunderpracticemetaltransfercastingscalpingschedulinghomogen-isationbreakdownmillrun-outtabletandemmillrerollcoilingcoldrollingcold rollcoilingslitting &post lubepackingshippingNon-Ferrous
17 what does industry need ? composition + processing = attributesThrough process modelling -(remember the list of attributes)the product is not just about properties (microstructure)industry has through process models - cost and geometrythe models really do have to be through processlocal sub-optimisation of part of the process stream is highly undesirabletandemmillrerollcoilingNon-Ferrous
18 how can academia help ? pre-competitive technology core technology communication ?pre-competitivetechnologycommunication ?core technologyenablingtechnologyNon-Ferrous
19 how can academia help ? pre-competitive technology this should be where academia deliversshould be natural partnerships with industryvalue is the knowledge base - not $peopleexpertise and experienceNon-Ferrous
20 how can academia help ? core technology care needed for academia involvementcould be natural partnerships with industrytechnology must remain within industryvalue can be economic if time-scale allowshow does academe get the rewards ?how does industry protect it’s core competency ?Non-Ferrous
21 how can academia help ? enabling technology enabling technology for one sector is core for anotherpotential competition between academia and industryacademia must understand product liabilityvalue will be economic if the development is soundNon-Ferrous
22 Aluminum-IThird most abundant element in the earth's crust, behind silicon and oxygen.Light Weight: Lightest available commercial metals with a density approximately one third that of steel or copper.Excellent Corrosion Resistance: due to the thin layer of aluminium oxideStrong: TS of pure Al is not high. But mech props can be improved greatly by alloying and tempering.Its electrical conductivity make it an excellent choice for electrical applications such as wiring and conductors.Its strength-to-weight ratio makes it attractive in structural applications as well as cast aluminum engine components, e.g. blocks, heads, and manifolds.Its high reflectivity of infrared and visible radiation makes it desirable in headlights, light fixtures, and many insulations. It is also used as a paint pigment.Non-Ferrous
23 Aluminum-IINontoxic, nonmagnetic and nonsparking. User for electrical shieldingPure aluminum has tensile strength 13,000 psi. Substential increae of strength is achievable by cold working or alloying.Have machinabillity or workability.ProductionUseNon-Ferrous23
24 Aluminum-III Atomic Number 13 Atomic Weight (g/mol) 26.98 Valency 3 PropertyValueAtomic Number13Atomic Weight (g/mol)26.98Valency3Crystal StructurefccPacking Density (%)74Co-ordination Number12Melting Point (ºC)660.2Electrical Conductivity (m/Ω-mm2)37.67Electrical Resistively at 20 ºC (μΩcm)2.69Density (g/cc)2.6898Modulus of Elasticity (Gpa)68.3Poisson Ratio0.34Poisson’s Ratio0.35UTS (60%elongation) (Psi)10,000Hardness (Brinell, 500 kg,10mm)1524
25 Applications:• Aerospace & air travel: structural components of planes, fuel tanks in spacecraft• Building and construction: panels, roofs, window frames…• Packaging: beverage cans, foil…• Transport: bikes, car engine parts, bus bodies…• Electrical:e.g. overhead cables
27 what’s new in aluminium ? metallurgy300 nm40 nmordered microstructuresultra-fine grained alloyssurfaces !warm forming - wrought tempersthixoformingNon-Ferrous
28 Copper, Brass, and Bronze It generally finds applications requiring high thermal and electrical conductivity. For example, the thermal conductivity of copper is almost ten times greater than ordinary steel. Therefore, it finds use as kitchen products, wiring and electrical applications, piping and tubing, and other such uses.Alloys of Copper and Zinc are termed brasses. Zinc is added to improve the strength and ductility of the alloy. Brass is used in decorative metal products, cartridge cases, piping and tubing, and many of the same application as copper.Non-Ferrous
29 BronzeAlloy of copper and any other metal. As with brasses, there are many formula for bronzes, depending on the application. Aluminum bronzes, tin bronzes, phosphor bronzes, nickel bronzes and silicon bronzes are all examples of varying alloys. The principle alloying element determines the nomenclature.Bronzes are used in applications such as bearings, decorative uses, and applications which require them not to spark when struck with another metal. This makes them useful in the transport and handling of items such as explosives, fuels, and flammable materials. Bronzes are often used in statues and can be seen to form the familiar green oxidized coating.Non-Ferrous
30 Magnesium Light material, lighter than aluminum Derived primarily from seawaterMagnesium is a very active metal and, when burned, gives off an intense heat and light.Used as an alloying element in steels and in applications which require high strength-to-weight ratios, such as extension ladders, aircraft, space vehicles, power tools, and similar applications.Non-Ferrous
31 Chromium Used in decorative and corrosion-resistant coatings. It is a major alloying element in many steels, especially stainless steels.It is used to provide a tough, wear-resistant, corrosion-resistant, decorative surface.Non-Ferrous
32 Nickel Used as a plating material. It polishes to a high luster. It offers a wide working temperature range.It is also used as an alloying element for other materials, such as steels and bronzes.Nickel is also used in magnets, heating elements, thermocouples, and rechargeable batteries.Nickel and nickel silver are used in jewelry and coins.Non-Ferrous
33 Gold, Silver, PlatinumThese are generally termed the precious metals due to their cost/value and use in coinage and jewelry. Gold, silver, and platinum are used as plating materials.They offer good conductivity and corrosion resistance. Gold and silver are too soft to be used in a pure form and are often alloyed with copper, nickel, or platinum to increase their strength.Gold and silver have been used for dental caps, crowns, and fillings.Non-Ferrous
34 SilverSilver finds application in photographic films and papers. At one time, it was used to plate mirrors.It is now used in the manufacture of photochromatic lenses. Photochromatic lenses darken when exposed to ultraviolet light.Silver is also used in brazing alloys and long-life batteries.Silver fulminate (Ag2C2N2O2) is used as an explosive.used for medicinal purposes.Non-Ferrous
35 PlatinumPlatinum is found in a group of six metals extracted from nickel ores -- iridium, osmium, palladium, rhodium, ruthenium, and platinum.Of these, platinum has the most widespread application. It is used in corrosion-resistant coatings, as a catalyst for chemical reactions, high-resistance furnace wire, and in catalytic converters.A large percentage of platinum is used in laboratory equipment, medical instruments, and fine jewelry. Platinum is more expensive per pound than gold.Non-Ferrous
36 Refractory MetalsThey find application where high temperature stability is required. For example, furnace components, high speed tools, temperature-measuring devices and components, aircraft components and space vehicle shields. These metals also find application in electrical devices such as capacitors and rectifiers.Non-Ferrous
37 TitaniumTitanium is lightweight and strong. It is an important metal for the aerospace industry which requires high strength under extreme conditions. It is also used in the medical field for instruments and artificial joint replacements. Titanium is also used as a pigment in paints.Non-Ferrous
38 White Metals: Lead, Tin, and Zinc White metals include antimony, bismuth, cadmium, lead, tin, and zinc. Of these, lead, tin, and zinc are of primary interest.Lead has been used for centuries for plumbing and plumbing-related uses, such as solders, pipe, and fittings. It is easily formed with low heat, corrosion resistant, and ductile.One primary use of lead in the past was as a pigment in lead-based paints. Modern paints and fuels do not contain lead. Lead has been identified as a health hazard and found to be toxic to animals and humans. Lead is used in storage batteries where the battery plates contain high percentages of lead. Due to its high density, it is also used as radiation shielding.Non-Ferrous
39 TinTin is a major component of solders. It is also used as both an alloying element. Tin is a major alloy of many copper products. It is used to plate other metals due to its corrosion resistance.Non-Ferrous
40 ZincZinc is commonly used as a plating material for steels. This product is termed galvanized steel. It is the familiar grayish coating seen on products such as nails and sheets. It is also used in die castings (such as die-cast children's toys, carburetor bodies, and pump housings) and as an alloying element in nonferrous metals. Zinc oxide is used in paints, glass, cements, and medicines.Non-Ferrous
41 Misc. Other AlloysFinally, antimony, bismuth, and cadmium are included in "white" metals. Antimony is used in solders and as an alloying element in nonferrous metals. The same may be said for bismuth which has the lowest thermal conductivity of any metal except mercury.Cadmium is used as a plating material, as a component of rechargeable batteries (Nickel-cadmium batteries), and as a neutron absorber in control rods for nuclear power plants.Zirconium is also used in nuclear reactor structures and fuel shielding due to its low neutron absorption.Non-Ferrous
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