The addition of elements to nickel alloys

There are two categories of added alloying elements: one is the solid solution strengthening element that can form a solid solution with nickel, such as copper, cobalt, iron, chromium, molybdenum, tungsten, manganese and so on. The other is the elements that form an intermediate compound strengthening phase with nickel, such as aluminum, silicon, beryllium, titanium, zirconium, hafnium, vanadium, niobium and tantalum. In addition, trace elements such as rare earth elements, boron, magnesium, calcium, strontium and barium are sometimes added for specific purposes and uses. When the reinforced solution strengthening element is added to nickel, its strength, hardness, shock resistance, corrosion resistance, oxidation resistance, high temperature strength and some physical properties, such as magnetism, thermoelectric potential, resistivity, etc. are significantly improved, while the expansion coefficient, thermoelectric potential and resistance temperature coefficient of copper are greatly reduced. When the alloy elements that can form a strengthening phase are added to nickel, the properties of the material, especially the high temperature mechanical properties, corrosion resistance and some physical properties, will be further improved. The addition of trace elements in the alloy is either to eliminate the adverse effects of harmful impurities on the alloy properties, or to make the alloy obtain some special physical properties, or to strengthen the alloy grain boundaries, so as to ensure that the alloy products have better use effects and longer service life.