منابع مشابه
Effect of a Thermal Annealing on the Mechanical Behaviour of Green Pm Compacts
In Powder Metallurgy the knowledge of the mechanisms governing the deformation behaviour of the material during its processing is in an initial stage due to the lack of an elasto-plastic model that could explain the mechanical behaviour, specially when the initial stage of powder die compaction is the one to be considered. For this reason geological models such as Cam-clay and Cap [1, 2, 3, 4] ...
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Current research efforts have concentrated on developing an instrumentation approach to test green-state powder metal (PIM) compacts by exploiting the conductivity or resistivity variations in the samples under test [1]. A novel multi-pin sensor is used to inject current in various directions through an array of outer contacts, and a matrix of 7 by 7 pointed needles record the voltage response ...
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In 1981, the US dairy industry experienced a major change in federal policy. From 1950 until 1981 farm level milk prices were supported at a minimum of 75 to 90 percent of parity. Under parity the support price and farm level milk prices trended upward most years. But in 1981, support prices were de-coupled from the parity index. Instead, the support price would be based on the level of milk su...
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Introduction Powder metallurgy (p/M) is a rapidly expanding technology for manufacturing of structural parts. The PA4 process provides economical as well as technical benefits over conventional processing of wrought material. It is possible to fabricate high quality, complex parts to close tolerances without machining. The energy consumption is low and the material utilisation and productivity ...
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ژورنال
عنوان ژورنال: Journal of the Japan Society of Powder and Powder Metallurgy
سال: 2001
ISSN: 0532-8799,1880-9014
DOI: 10.2497/jjspm.48.1082