CAJ | 학술논문

将Zr52.5Cu17.9Ni14.6Al 10Ti5 (Vit105)块体非晶合金棒用水砂纸和抛光膏打磨到不同粗糙度,研究表面粗糙度对试样压缩变形行为的影响.结果表明,随着试样表面粗糙度的降低,屈服强度并没有明显变化,但压缩塑性从2.3％提高到4.5％.在扫描电镜下观察断裂试样的侧面发现,塑性越大的试样,剪切带的密度越大.因此,对于非晶合金,要得到较大的塑性,降低表面粗糙度是必要的.
장Zr52.5Cu17.9Ni14.6Al 10Ti5 (Vit105)괴체비정합금봉용수사지화포광고타마도불동조조도,연구표면조조도대시양압축변형행위적영향.결과표명,수착시양표면조조도적강저,굴복강도병몰유명현변화,단압축소성종2.3％제고도4.5％.재소묘전경하관찰단렬시양적측면발현,소성월대적시양,전절대적밀도월대.인차,대우비정합금,요득도교대적소성,강저표면조조도시필요적.
Zr52.5Cu17.9Ni14.6Al10Ti5 (Vitl05) bulk metallic glass (BMG) rods were abraded to different surface roughnesses using different types of waterproof abrasive papers and sometimes polishing pastes,and the compressive deformation behavior was examined.The results show that the yield strength of the BMG is hardly affected while the compressive plasticity increases from 2.3％ to 4.5％ with decreasing the surface roughness.Observation of the fractured samples under a scanning electron microscope indicates that the rise in plasticity is accompanied with an increase in shear band density.The results suggest that it is necessary to reduce the surface roughness of BMGs for achieving a large plasticity.