Instrumented Indentation of Carbides in a Martensitic Matrix and in a Sintered Sample

Evaluation of abrasive mechanisms in metallic alloys during scratch tests: a numerical-experimental study in micro-scale.

“…Regarding the AISI H13 steel, the mechanical properties were measured by tensile tests of specimens dimensioned in accordance with the ASTM E8 Standard The NbC -hard second phase particles dispersed in the martensitic matrix of the H13 steel -elastic modulus and the hardness at room temperature were obtained from Tertuliano et al (2017). The measurements in sintered NbC were conducted by instrumented indentation (TI-950 Triboindenter-Hysitron).…”

“…NbC -Shell 372 ± 2 (1) 338-580 (2) 24 ± 1 (1) 0.21 (2) 7,790 (2) Tix-Nb1-x-C -Core 466 (3) 20 ± 10 (4) 0.21 (3) 5,606 References: (1) (TERTULIANO et al, 2017); (2) (PIERSON, 1996b); (3) (CHEN; ZHAO, 2007); (4) The major data inputs of the mechanical properties (Figure 34) of the hard material phases were exposed here. The NbC with composition variations was considered elastic, while the martensitic matrix was accounted as elastic-plastic with the von Mises plasticity criterion.…”

Consolidação do carboneto de nióbio (NbC) e compósitos por Spark Plasma Sintering (SPS): caracterização microestrutural e mecânica.

“…Figura 39 -Indentação instrumentada feita com a carga de 10 mN na amostra NbC 220. Em a) Micrografia mostrando as impressões feitas em diferentes grãos na microestrutura da amostra com densificação de 96%, identificadas de S1 até S9, b) Valores resultantes das impressões (S1 -S9) de dureza (HV) e módulo elástico reduzido (Er) e c) Curvas de carregamento e descarregamento correspondentes as impressões identificadas anteriormente (S1 até S9).FonteTertuliano et al (2017).…”