The effect of nickel additions on the microstructure and ultimate tensile strength of alloy Al – 10% Si – 5% Cu in cast and heat treated conditions is studied. The nickel content optimum for obtaining a maximum-strength alloy is determined. The conditions at which a fishbone morphology negatively affecting the mechanical properties does not form are determined. Mechanical stirring of the
Nickel also reduces thermal expansion for better dimensional stability. Nickel is the base element for superalloys. These metals have excellent resistance to thermal creep deformation and retain their stiffness, strength, toughness and dimensional stability at temperatures much higher than the other aerospace structural materials.
1. Chemical and Physical Data. The list of nickel alloys and compounds given in Table 1 is not exhaustive, nor does it necessarily reflect the commercial importance of the various nickel-containing substances, but it is indicative of the range of nickel alloys and compounds available, including some compounds that are important commercially and those that have been tested in biological systems.
German scientists at Saarland University have produced a prototype machine that transfers heat using a nickel-titanium ("nitinol") alloy wire wrapped around a rotating cylinder. As the cylinder rotates, heat is absorbed on one side and released on the other, as the wire changes from its "superelastic" state to its unloaded state.
Properties of Commercially Pure Nickel. Compared to nickel alloys, commercially pure nickel has high electrical conductivity, a high Curie temperature and good magnetostrictive properties. Nickel is used for electronic lead wires, battery components, thyratrons and sparking electrodes. Nickel also has good thermal conductivity. Today, stainless steel, another nickel containing alloy, is one of the most valuable materials of the 20 th century. The U.S. five-cent piece is 25% nickel. The element is also an important alloying agent for stainless steels and in very powerful magnets.
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3. You can test for nickel ingredients in your jewelry at home. Dr. Levin tells her patients who have an allergy to purchase an over-the-counter dimethylglyoxime spot test ($19), which can detect For example, beryllium copper attains the greatest strength (to 1,400 MPa) of any copper-based alloy. Copper-nickel Alloy. Cupronickels are copper-nickel alloys that contain typically from 60 to 90 percent of copper and nickel as the main alloying element. The two main alloys are 90/10 and 70/30. 1sX71l.
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    • does alloy have nickel