TY - JOUR
T1 - EFFECT OF SUBSTRUCTURE FORMED IN PRIOR beta GRAIN ON CRACK INITIATION AND PROPAGATION TOUGHNESS OF Ti-6 Al-2 Sn-4 Zr-6 Mo ALLOY.
AU - Niinomi, Mitsuo
AU - Inagaki, Ikuhiro
AU - Kobayashi, Toshiro
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 1988
Y1 - 1988
N2 - The instrumented Charpy impact test and static and dynamic fracture toughness tests were carried out on an alloy in which the prior beta grain size was changed by heat treatment. The elongation, crack initiation and propagation toughness increased with a slight decrease in strength in specimens with increased prior beta grain size with prolonged solution treatment time. The increase in crack initiation toughness was mainly caused by an increase in the widmanstaetten a lath. The increase in crack propagation toughness was caused by deflection of the crack pass. The intersubcolony spacing decreased with an increase in alpha nucleation during diffusion-controlled alpha yields beta transformation. In such situation, alpha nucleated in the interior of the beta grain and increased with the introduction of strain.
AB - The instrumented Charpy impact test and static and dynamic fracture toughness tests were carried out on an alloy in which the prior beta grain size was changed by heat treatment. The elongation, crack initiation and propagation toughness increased with a slight decrease in strength in specimens with increased prior beta grain size with prolonged solution treatment time. The increase in crack initiation toughness was mainly caused by an increase in the widmanstaetten a lath. The increase in crack propagation toughness was caused by deflection of the crack pass. The intersubcolony spacing decreased with an increase in alpha nucleation during diffusion-controlled alpha yields beta transformation. In such situation, alpha nucleated in the interior of the beta grain and increased with the introduction of strain.
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U2 - 10.2355/tetsutohagane1955.74.3_543
DO - 10.2355/tetsutohagane1955.74.3_543
M3 - Article
AN - SCOPUS:0023978804
VL - 74
SP - 543
EP - 550
JO - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
JF - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
SN - 0021-1575
IS - 3
ER -