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grain strength

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  • Grain boundary strengthening — (or Hall Petch strengthening) is a method of strengthening materials by changing their average crystallite (grain) size. It is based on the observation that grain boundaries impede dislocation movement and that the number of dislocations within a …   Wikipedia

  • grain size measurement — grain size is normally quantified by a numbering system. Coarse 1 5 and fine 5 8. The number is derived from the formula N=2n 1 where n is the number of grains per square inch at a magnification of 100 diameters. Grain size has an important… …   Mechanics glossary

  • Strength of materials — Internal force lines are denser near the hole, a common stress concentration In materials science, the strength of a material is its ability to withstand an applied stress without failure. The applied stress may be tensile, compressive, or shear …   Wikipedia

  • Grain boundary — A grain boundary is the interface between two grains in a polycrystalline material. Grain boundaries disrupt the motion of dislocations through a material, so reducing crystallite size is a common way to improve strength, as described by the Hall …   Wikipedia

  • Shear strength (soil) — Shear strength in reference to soil is a term used to describe the maximum strength of soil at which point significant plastic deformation or yielding occurs due to an applied shear stress. There is no definitive shear strength of a soil as it… …   Wikipedia

  • ABB Grain Limited — Infobox Company company name = ABB Grain Limited company company type = Public (asx|ABB) foundation = 1939 [ *cite news |first= |last= |authorlink= |coauthors= |title= Shareholders |url=http://www.ngr.com.au/shareholders.aspx |work=National… …   Wikipedia

  • Size Strength classification — is a two parameter rock classification based on the strength of intact rock and the spacing of discontinuities in the rock mass. It was developed by Louis and Franklin (1970 75). The size strength approach to rock mass characterisation has been… …   Wikipedia

  • transverse strength — a measurement of strength when the load is applied across the longitudinal flow of the grain of a metal. Certain impurities such as sulphur have a detrimental effect on the transverse strength. This can be minimized by the inclusion modification… …   Mechanics glossary

  • Liquidmetal — Liquid metal is also a name for Galinstan, a fusible alloy liquid at room temperature, used as a replacement of mercury.Liquidmetal and Vitreloy are commercial names of a series of amorphous metal alloys developed by a California Institute of… …   Wikipedia

  • Windsor chair — A Windsor chair is a chair built with a wooden seat into which are fixed the backrest and undercarriage. Typically, the backrest and sometimes the arm pieces are formed from steam bent pieces of wood. History Windsor chairs were developed in the… …   Wikipedia

  • Hydraulic fracturing — is a method used to create fractures that extend from a borehole into rock formations, which are typically maintained by a proppant. The method is informally called fracing or hydrofrac. The technique is used to increase or restore the rate which …   Wikipedia

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