![]() 11, 12Īnother notable characteristic of metal AM, which has received less attention compared with shape control, is the wide control that is possible over microstructure and texture. Moreover, in some cases, AM has been combined with topology optimization. Hence, AM has been applied to fabricate various products, including those with a hollow structure, three-dimensional complex porousous bodies, and custom-developed products. 1, 2, 3, 4, 5, 6 The most significant advantage of AM is that it allows the production of complex, net-shape geometries 7, 8, 9, 10 that cannot be achieved using standard manufacturing techniques such as casting or forming. Recently, additive manufacturing (AM) has attracted considerable attention for application in important manufacturing processes. The importance of the crystallographic “multiplicity” of the preferential crystal growth direction is described to understand the evolution behavior of the texture in such materials. In addition, the texture evolution behavior of face- and body-centered cubic as well as noncubic materials is discussed. The transient behavior of the texture and the factor used to control it via the scan strategy are discussed. One of the unique characteristics of AM is that the texture can be varied as a function of position within the product by controlling the scan strategy. This paper discusses recent progress pertaining to texture evolution mechanisms and control methods, with an emphasis on selective laser melting. Additionally, in AM of metal and ceramics, which has received less attention, the microstructure and texture of the product can be arbitrarily controlled by selecting appropriate process parameters, thereby enabling unprecedented superior properties. In 2019, the meter has been re-defined based on the changes made to the definition of a second.Additive manufacturing (AM) enables the production of complex, net-shape geometries. Prior to this definition, the meter was based on the length of a prototype meter bar. The relationship between the meter and the millimeter is constant however. ![]() The definition of the meter has changed over time, the current definition being based on the distance traveled by the speed of light in a given amount of time. It indicates one thousandth of the base unit, in this case the meter. ![]() History/origin: The milli- prefix is one of many metric prefixes. It is defined in terms of the meter, as 1/1000 of a meter, or the distance traveled by light in 1/299 792 458 000 of a second. Millimeterĭefinition: A millimeter (symbol: mm) is a unit of length in the International System of Units (SI). Height is commonly measured in centimeters outside of countries like the United States. Learning some of the more commonly used metric prefixes, such as kilo-, mega-, giga-, tera-, centi-, milli-, micro-, and nano-, can be helpful for quickly navigating metric units.Ĭurrent use: The centimeter, like the meter, is used in all sorts of applications worldwide (in countries that have undergone metrication) in instances where a smaller denomination of the meter is required. Metric prefixes range from factors of 10 -18 to 10 18 based on a decimal system, with the base (in this case the meter) having no prefix and having a factor of 1. History/origin: A centimeter is based on the SI unit meter, and as the prefix "centi" indicates, is equal to one hundredth of a meter. Definition: A centimeter (symbol: cm) is a unit of length in the International System of Units (SI), the current form of the metric system.
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