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| a measure of the degree of plastic deformation that has sustained at fracture |
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| the capacity of a material to absorb energy which a deformed elastically. |
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| metal that experiences very little or no plastic deformation fracture |
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| The slope of the linear elastic region of the shear stress-strain curve |
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Definition
| ratio of the lateral and axial strains |
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| Poisson's ratio for isotropic materials |
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| motion of dislocation in non crystalline solids occurs by a viscous mechanism |
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Definition
| gradual elastic-plastic transition. The initial departure from linearity of the stress-strain curve |
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Definition
| The stress corresponding to the intersection of this line and the stress-strain curve as it bends over in the plastic region |
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| is the stress corresponds to maximum stress that have be sustained by a structure in tension |
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Definition
| capacity of a material to absorb energy when it is deformed elastically and then, upon unloading to have this energy recovered. |
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Definition
| the ability of a material to absorb energy and plastically deform without fracturing |
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Definition
| the strain energy per unit volume required to stress a material from an unloaded state up to the point of yielding |
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Definition
| the load F divided by the instantaneous unit time which deformation is occuring |
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Definition
| a measure of a materials resistance to localized plastic deformation |
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Definition
| indicative of the stress at which plastic deformation begins |
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Term
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Definition
| upon cooling, liquid phase is transformed into its solid state a(alpha) and b(beta) phases at the temperature TE; the opposite reaction occurs upon heating |
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Term
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Definition
| solid solubility limit line separating the alpha and alpha+beta phase regions |
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Definition
| the distribution of two elements within grains and non uniform |
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Definition
| components that have complete liquid and solid solubility |
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| control of the phase structure of a particular system is conveniently concisely displayed |
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| pressure-temperature diagram |
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Definition
| refers to equilibrium as it applies to systems in w/c none than one phase may exist |
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Term
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Definition
| is another essential concept that is best described in terms of a thermodynamic quantity called the free energy |
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Definition
| is a function of the internal energy of a system and also the randomners of disorder of the atoms or molecules (entropy) |
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Definition
| a homogeneous portion of a system that has uniform physical and chemical characteristics |
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Definition
| is subject to direct microscopic obeservation using optical microscope |
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Definition
| the maximum concentration of solute atoms that may dissolve in the solvent to form a solid solution |
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| a state of equilibrium is extremely slow |
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| maps that represent the relationships between temperature and the compositions and quantities of phases at equilibrium |
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| metal alloys that are used to bond or join two or more components |
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| an element of the microstructure having an identifiable and characteristic structure |
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| composition ranges near the concentration extremities of the phase diagram |
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| reverse reaction occurs upon heating |
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