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The process,also known as homogenizing annealing,is employed to remove any structural non uniformity.In diffusion annealing treatment,steel is heated sufficiently above the upper critical temperature,and is held at this temperature for prolonged periods,usually 10 to 20 hours,followed by slow ...
In this process,hypoeutectoid steel is heated above the upper critical temperature and held for some time at this temperature.This is done in order to get a completely austenitic structure and to eliminate any temperature gradient within the steel component.
The term annealing,until and unless specified,means full annealing.It consists of heating steel to austenitic region,followed by slow cooling.Steel is heated to about 30 to 50 degree above the upper critical temperature for hypoeutectoid steels.
Annealing,in general,involves heating to predetermined temperature,holding at this temperature,and finally cooling at a very slow rate.The temperature,to which steel is heated,and the holding time are determined by various factors such as the chemical composition of steel,size and shape of steel ...
A vacancy is a lattice position that is vacant because the atom is missing. It is created when the solid is formed. There are other ways of making a vacancy, but they also occur naturally as a result of thermal vibrations.
All crystals whose structures can be described by layers are prone to stacking faults. A stacking fault is any defect that alters the periodic sequence of layers. These defects may be a wrong layer inserted into the sequence, a change of the layer sequence or a different translation between two ...
A process in which two or more crystals, or parts of crystals, assume orientations such that one may be brought to coincidence with the other by reflection across a plane or by rotation about an axis. Crystal twins represent a particularly symmetric kind of grain boundary; however, the energy of ...
Solid materials have pores in them, sometimes these pores are almost microscopic in size, and sometimes they're very visible. Porosity is a measure of how much air or liquid can be absorbed by these materials.
