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The Lankford coefficient (also called Lankford value, R-value, or plastic strain ratio) [1] is a measure of the plastic anisotropy of a rolled sheet metal. This scalar quantity is used extensively as an indicator of the formability of recrystallized low-carbon steel sheets. [2]
It automates the calculation of ideal distribution of the cutting patterns to avoid waste. [2] The process involves the analyses the parts (shapes) to be produced at a particular time. Using algorithms , it then determines how to lay these parts out in such a way as to produce the required quantities of parts, while minimizing the amount of raw ...
Severe plastic deformation (SPD) is a generic term describing a group of metalworking techniques involving very large strains typically involving a complex stress state or high shear, resulting in a high defect density and equiaxed "ultrafine" grain (UFG) size (d < 1000 nm) or nanocrystalline (NC) structure (d < 100 nm).
In one study, strain hardening exponent values extracted from tensile data from 58 steel pipes from natural gas pipelines were found to range from 0.08 to 0.25, [1] with the lower end of the range dominated by high-strength low alloy steels and the upper end of the range mostly normalized steels.
In structural engineering, the plastic moment (M p) is a property of a structural section. It is defined as the moment at which the entire cross section has reached its yield stress . This is theoretically the maximum bending moment that the section can resist – when this point is reached a plastic hinge is formed and any load beyond this ...
The work-hardened steel bar has a large enough number of dislocations that the strain field interaction prevents all plastic deformation. Subsequent deformation requires a stress that varies linearly with the strain observed, the slope of the graph of stress vs. strain is the modulus of elasticity, as usual.
Manufacturers Association of Nigeria also known as MAN is a trade group headquartered in Lagos. The group acts as a platform that manufacturers use to influence economic, industrial, labour and social policy within Nigeria. [1] The organization was founded in 1971 and was preceded by the Apapa and Ikeja manufacturers association.
The Mines and Steel Development Ministry is a Nigerian ministry established in 1985 to encourage development of the country's solid mineral resources. The Ministry formulates policy, provides information on mining potential and production, regulates operations and generates revenue for the government.