Title: Pressure dependence of yielding and associated volume expansion in tempered martensite
Abstract: Abstract The stress-strain behavior of quenched and tempered AISI 4310 and 4330 steels was examined in tension and compression under superimposed hydrostatic pressures up to 160 ksi (1104 MN/m 2 ). The results showed that yield and flow stresses were sensitive to hydrostatic pressure, but that work hardening and the magnitude of the strength-differential (S-D) effect between compression and tension were relatively insensitive. Measurements of the volume changes occurring during plastic deformation at atmospheric pressure showed that the plastic volume expansion was larger than that measured in materials which show a smaller S-D effect. The observations on pressure dependence of yielding were used to derive a specific yield condition for these steels, and the observations on volume expansion were then used to test the normality of the plastic-strain-rate vector to this yield surface. Results showed that the plastic volume expansion predicted by the normality flow rule was about fifteen times greater than that observed.
Publication Year: 1975
Publication Date: 1975-07-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 374
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