Micromechanics of Ti(C,N)-FeNi Composites
The unique combination of hardness,toughness and wear resistance exhibited by Ti(C,N)-FeNi composite has made them a preeminent material candidate to substitute the conventional WC-Co cemented carbides(hardmetals).The remarkable mechanical properties of these materials result from their effectiveness associated with its composite character,as they combine two completely different phases(hard and brittle ceramic particles(Ti(C,N)and a soft and ductile metallic FeNi binder)with functional interface properties.The number of studies reported on the small-scale mechanical response of these materials is rather scarce.This is particularly true regarding experimental data and analysis on the influence of phase nature and interfacial adhesion strength on hardness,deformation and/or damage mechanisms.It is clear that knowledge of these issues is crucial to improve the performance of Ti(C,N)-FeNi systems.The present work aims to conduct a systematic micro-and nanomechanical study of the mechanical integrity of different Ti(C,N)-FeNi grades.It is found that ceramic particles are isotropic in terms of hardness,yielding a homogeneous value of around 34 GPa.Local hardness measured within the metallic phase permits to extract flow stress for the constrained metallic binder,yielding values range between 3 and 3.5 GPa.
Ti(C,N)-FeNi composites Mechanical properties Plasticity Damage Micro-and nanometric length scale
Besharatloo Hossein Roa Joan Josep De Dios Miguel De Nicolas Maria Mateo Antonio M. Ferrari Bego(n)a Gordo Elena Llanes Luis
CIEFMA-Department of Materials Science and Metallurgy,EEBE-Barcelona East School of Engineering,10-1 IMAAB-Department of Materials Science and Engineering,University Carlos Ⅲ of Madrid,30 Avda.Universi
国际会议
北京
英文
878-882
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）