TY - JOUR
T1 - Identification of damage tolerance of Ti3SiC2 by hardness indentations and single edge notched beam test
AU - Li, S. B.
AU - Cheng, L. F.
AU - Zhang, L. T.
PY - 2002/2
Y1 - 2002/2
N2 - The damage tolerance of Ti3SiC2 has been identified by Vickers indentations and single edge notched beam (SENB) testing. The Vickers indentations were made at loads of 0·5-30 kg to measure the hardness. The results showed that the hardness decreased with increasing loads. No indentation cracks were observed around the damage zones, even when the load applied was 30 kg. The material around microhardness indentations was pushed out, lots of grains were crushed into fragments under loads, and some grains exhibited lamination fracture. In addition, around the damage zones, a number of individual grains were delaminated and deformed heavily into a twisted shape. This suggests that Ti3SiC2 exhibits plasticity at room temperature. Moreover, the SENB test also suggested that this layered material is damage tolerant. The multi-absorbing energy mechanisms: grain pushout, pullout, and delamination, the buckling of individual grains, crack deflection, crack branching, and pinning, explained why the Ti3SiC2 is a damage tolerant material able to contain the extent of microdamage.
AB - The damage tolerance of Ti3SiC2 has been identified by Vickers indentations and single edge notched beam (SENB) testing. The Vickers indentations were made at loads of 0·5-30 kg to measure the hardness. The results showed that the hardness decreased with increasing loads. No indentation cracks were observed around the damage zones, even when the load applied was 30 kg. The material around microhardness indentations was pushed out, lots of grains were crushed into fragments under loads, and some grains exhibited lamination fracture. In addition, around the damage zones, a number of individual grains were delaminated and deformed heavily into a twisted shape. This suggests that Ti3SiC2 exhibits plasticity at room temperature. Moreover, the SENB test also suggested that this layered material is damage tolerant. The multi-absorbing energy mechanisms: grain pushout, pullout, and delamination, the buckling of individual grains, crack deflection, crack branching, and pinning, explained why the Ti3SiC2 is a damage tolerant material able to contain the extent of microdamage.
UR - http://www.scopus.com/inward/record.url?scp=0036479013&partnerID=8YFLogxK
U2 - 10.1179/026708301225000653
DO - 10.1179/026708301225000653
M3 - 文章
AN - SCOPUS:0036479013
SN - 0267-0836
VL - 18
SP - 231
EP - 233
JO - Materials Science and Technology
JF - Materials Science and Technology
IS - 2
ER -