precipitation hardening


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precipitation hardening

n
(Metallurgy) metallurgy a process in which alloys are strengthened by the formation, in their lattice, of a fine dispersion of one component when the metal is quenched from a high temperature and aged at an intermediate temperature
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Addition of manganese to the new alloy successfully replaced the [pi] phase by the [alpha] phase and as a result all the magnesium in the alloy was available for precipitation hardening explaining the higher strength.
6xxxx aluminium alloys are heat treatable because of a phenomenon called precipitation hardening. Heat treated aluminium alloys do not harden due to martensitic transformation, like steel does.
UNS S17400 H900 is a chromium-copper precipitation hardening stainless steel that is used for applications requiring high strength and corrosion resistance.
In addition, it is aimed to achieve finer grains of the steel via precipitation hardening by adding an alloying element, resulting in hardness increment on the raceway and the matrix.
The precipitation hardening of as-cast superalloys is generally carried out by a controlled heat treatment which may consist of a homogenization period followed by several aging steps.
Precipitation and Precipitation hardening are very important phenomena as they are equally useful in Chemistry (Solid State), Physical Metallurgy and Solid State Physics.

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