Ductility solid solution

Iron Low-carbon steels Low-carbon alloy steels Decarburised malleable Chromium 980-1 050 (Halide) 1. Gaseous 2. Semi- gaseous 3. Pack 25-75 urn Solid-solution (ferritic) 20-25% Cr Ductile (200-300 HV) Weldable Heat treatment acceptable ... 

Main uses of lithium alloys. Li additions often change completely the properties of metals to which it is added, for instance hardness of A1 and Pb (addition of Li to Pb results in the formation of Pb solid solution and a eutectic at 15.7 at.% Li with LiPb) and ductility of Mg. Al-alloys can be of great interest in aerospace industry Li (as Be) simultaneously reduces the density of A1 and increases its modulus of elasticity. Each 1 mass% Li up to the solubility limit (4.2 mass%) reduces density by about 3% and increases modulus by 5%. Precipitates homogeneously distributed of spherical LiAl3 in diluted Li-alloys during heat treatment may improve strength. 

Nickel-silver possesses considerable malleability, ductility, and tensile strength. No compounds of the three constituent metals are formed, and the alloy is a simple, homogeneous, solid solution. 

Properties Silver-white, ductile solid ((3 form). D 7.29 (20C), mp 232C, bp 2260C. Changes to brittle, gray (a) tin at temperature of 18C, but the transition is normally very slow. Soluble in acids and hot potassium hydroxide solution insoluble in water. Elemental tin has low toxicity, but most of its compounds are toxic. 

Properties Dense, silvery solid. D 19.0, mp 1132C, bp3818C, heat of fusion 4.7 kcal/mole, heat capacity 6.6 cal/mole/C. Strongly electropositive, ductile and malleable, poor conductor of electricity. Forms solid solutions (for nuclear reactors) with molybdenum, niobium, titanium, and zirconium. The metal reacts with nearly all nonmetals. It is attacked by water, acids, and peroxides, but is inert toward alkalies. Green tetravalent uranium and yellow uranyl ion (U()2") are the only species that are stable in solution. 

The calculations on the electronic structure and Fermi surface of Cr-Re alloys carried out by Medvedeva et al. [9, 10] concluded that even small percentages of Re alloying sharply increase the DOS and weaken the Cr-Cr bonding, rendering dislocation motion ar room temperature possible. A further ductilizing phenomenon presented by Medvedeva, the formation of impurity scavenging Cr-Re A15 type structures at near solid solution Re percentages is still opened for discussion. 

Research efforts were subsequently directed at strengthening the Fe-12Ni-0.5A1 alloy. Solid solution strengthening was abandoned early in the investigation, because this approach caused the ductile-brittle transition temperature to increase with a corresponding drop in toughness. 

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