The effect of hydrostatic pressure on the tensile fracture of α-brass

Published on Nov 1, 1973in Acta Metallurgica
· DOI :10.1016/0001-6160(73)90183-1
I.E. French7
Estimated H-index: 7
P.F Weinrich1
Estimated H-index: 1
P.F Weinrich2
Estimated H-index: 2
(Australian Department of Defence)
Abstract A detailed study has been made of the effects of hydrostatic pressures in the range 0.1–600 MPa on the tensile fracture strain of an α-brass. Fracture strain has been found to increase linearly with pressure up to 350 MPa, to decrease between pressures of 350 and 375 MPa and to then increase to a constant value at pressures greater than 450 MPa. The abrupt change from linearity of the fracture strain-pressure relationship at a pressure of 350 MPa was found to coincide with the suppression of large scale void development. At pressures below 350 MPa, fracture was found to occur by the conventional mechanism involving void coalescence whereas at higher pressures fracture occurred entirely by a shear process. Calculations of the increase of the resultant triaxial stress component in the necked region of specimens with strain have shown that, at pressures up to 350 MPa, fracture occurs when this stress reaches a critical value of about 325 MPa.
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