CAJ | 학술논문

利用纳米压痕技术研究直径为3 mm的{[(Fe0.6Co0.4)0.75B0.2Si0.05]0.96Nb0.04}96Cr4块体非晶合金的变形行为以及加载速率对其塑性变形行为的影响规律.结果表明:该块体非晶合金在低加载速率下表现出显著的锯齿流变,而在高的加载速率下表现为连续的塑性变形;在纳米压痕过程中,该块体非晶合金出现室温蠕变现象,且其硬度值随着加载速率的增大而减小.
이용납미압흔기술연구직경위3 mm적{[(Fe0.6Co0.4)0.75B0.2Si0.05]0.96Nb0.04}96Cr4괴체비정합금적변형행위이급가재속솔대기소성변형행위적영향규률.결과표명:해괴체비정합금재저가재속솔하표현출현저적거치류변,이재고적가재속솔하표현위련속적소성변형;재납미압흔과정중,해괴체비정합금출현실온연변현상,차기경도치수착가재속솔적증대이감소.
The deformation behaviour of {[(Fe0.6Co0.4)0.75B0.2Si0.05]0.96Nb0.04}96Cr4 bulk amorphous alloy with a diameter of 3 mm and the influence of loading rate on its plastic deformation were investigated by the technique of nanoindentation. The results show that the {[(Fe0.6Co0.4)0.75B0.2Si0.05]0.96Nb0.04}96Cr4 bulk amorphous alloy exhibits prominent serrated flow at low loading rate while the plastic deformation is continuous at high loading rate. During nanoindentation, the room temperature creep of the {[(Fe0.6Co0.4)0.75B0.2Si0.05]0.96Nb0.04}96Cr4 bulk amorphous alloy is observed, and its hardness decreases with the increase of loading rate.