Variation in Mechanical Properties of P/M Parts
The final mechanical properties of P/M parts are strongly effected by the processing parameters. Processing controls porosity, composition, and microstructure. Variations within the processing sequence lead to significant property variations. Variations in strength values are often accounted for by the publication of typical values and minimum values. Other mechanical properties important for critical applications, such as toughness, are even more sensitive to processing. This paper discusses the use of Weibull statistics to analyze the properties of P/M parts and suggest new ways to determine property variability for design application. Examples of different properties and materials are used to illustrate the variation. The effect of processing parameters in controlling the variability are discussed. Weibull parameters are suggested as being more suitable for designers than the current system.
J. W. Newkirk, "Variation in Mechanical Properties of P/M Parts," Proceedings of the International Symposium on Powder Materials: Current Research and Industrial Practices (2001, Indianapolis, IN), pp. 223-232, Minerals, Metals and Materials Society (TMS), Nov 2001.
Powder Materials: Current Research and Industrial Practices (2001: Nov. 4-8, Indianapolis, IN)
Materials Science and Engineering
Keywords and Phrases
Microstructure; Porosity; Weibull Distribution; Weibull Statistics; Powder Metallurgy
International Standard Book Number (ISBN)
Article - Conference proceedings
© 2001 Minerals, Metals and Materials Society (TMS), All rights reserved.