Changes in dimensions of porous metal fiber materials subjected to pressing and sintering
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During pressing and sintering, high-porosity materials from metal fibers exhibit dimensional changes induced by residual stress relaxation, which may attain several tenths.
The total strain observed, which exceeds the purely elastic strain of a porous fiber material by one order of magnitude or more, is associated with the structural characteristics of the material.
To suppressthe undesirable material “growth” phenomenon occurring during sintering as a result of residual stress relaxation, a two-stage heat treatment may be employed.
KeywordsHeat Treatment Residual Stress Structural Characteristic Stress Relaxation Elastic Strain
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