FCC/BCC積層Fe-Cr-Ni合金の圧縮変形挙動

抄録

The FCC and BCC Fe-Cr-Ni alloys sheets were laminated alternatively, then heated up to 1 273 K and bonded under the applied stress of 28 MPa. The thickness of each layer was approximately 600 μm. The cubic compression test specimens were cut from the laminated composite material, where three directions, i.e., the compression axis of 0°, 45° and 90° against the normal direction of each component layer were adopted(hereafter they are called 0°, 45° or 90° specimen). Some specimens were aged at 753 K for 360 ks to enlarge the strength of high Cr BCC layers. The bonded interface seemed to be so strong that no decohesion was observed by the compression test down to the strain of 30%.
The 90° specimen has shown the largest flow stress and the 0° one slightly smaller. The 45° specimen deforms in a distinguished anisotropic manner and has shown the lowest flow stress. This trend is emphasized when the strength of the BCC layer is enlarged. These results are discussed from the standing points of inhomogeneous deformation, the thickness of the layer, and the size of test specimen.