TY - JOUR
T1 - Deformation microstructure developed by nanoindentation of a MAX Phase Ti2AlC
AU - Wada, Yusuke
AU - Sekido, Nobuaki
AU - Ohmura, Takahito
AU - Yoshimi, Kyosuke
N1 - Funding Information:
This research is partially supported by the Advanced Low Carbon Technology Research and Development Program from Japan Science and Technology Agency, JST.
Publisher Copyright:
© 2018 The Japan Institute of Metals and Materials.
PY - 2018
Y1 - 2018
N2 - Deformation microstructure that developed during nanoindentation of a MAX phase Ti2AlC was characterized by the scanning probe microscopy and the transmission electron microscopy. To investigate the plastic anisotropy, nanoindentation measurements were made on grains with the normal parallel to h3362 i, h0001i, and h1120 i. The basal slip, f0001gh1120 i, was found to be predominant as the deformation mechanism for all the indentation directions. It was also indicated that, upon nanoindentation along h0001i and h1120 i, non-basal slips occurred underneath the indenter. The slip system of the non-basal dislocations was identified to be ð12 16 Þ½1211 by analyzing the dislocations. Furthermore, fine-scaled kink-bands were found to form underneath the residual impression. The formation of the kink-band was accompanied by delamination, i.e., micro-cracking along the basal plane, suggesting that the delamination plays an important role for kink-band formation in Ti2AlC.
AB - Deformation microstructure that developed during nanoindentation of a MAX phase Ti2AlC was characterized by the scanning probe microscopy and the transmission electron microscopy. To investigate the plastic anisotropy, nanoindentation measurements were made on grains with the normal parallel to h3362 i, h0001i, and h1120 i. The basal slip, f0001gh1120 i, was found to be predominant as the deformation mechanism for all the indentation directions. It was also indicated that, upon nanoindentation along h0001i and h1120 i, non-basal slips occurred underneath the indenter. The slip system of the non-basal dislocations was identified to be ð12 16 Þ½1211 by analyzing the dislocations. Furthermore, fine-scaled kink-bands were found to form underneath the residual impression. The formation of the kink-band was accompanied by delamination, i.e., micro-cracking along the basal plane, suggesting that the delamination plays an important role for kink-band formation in Ti2AlC.
KW - Deformation microstructure
KW - Kink band
KW - MAX phase
KW - Nanoindentation
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U2 - 10.2320/matertrans.MBW201703
DO - 10.2320/matertrans.MBW201703
M3 - Article
AN - SCOPUS:85046357025
VL - 59
SP - 771
EP - 778
JO - Materials Transactions
JF - Materials Transactions
SN - 1345-9678
IS - 5
ER -