TY - GEN
T1 - Effect of Al addition on phase constitution and heat treatment behavior in Ti-8 5mass%Mn-1mass%Fe-Al alloys
AU - Ikeda, Masahiko
AU - Ueda, Masato
AU - Sumi, Yoshinori
AU - Niinomi, Mitsuo
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2014
Y1 - 2014
N2 - Titanium is considered to be a ubiquitous element since it has the 9th-highest Clarke number of all elements. Iron and manganese can also be used as beta stabilizers for Ti alloys, and can be considered to be ubiquitous because of their 4th- and 11th-highest Clarke numbers, respectively. However, investigations into the behavior of Ti-Mn-Fe alloys during heat treatment have shown that in some alloys, the isothermal omega phase is precipitated. Because this phase can lead to brittleness, it is very important to prevent it from forming. It is well known that aluminum can suppress the precipitation of the isothermal omega phase. Thus, in the present study, we investigated the effect of Al content on the phase constitution and heat-treatment behavior of Ti-8.5mass%Mn-1mass%Fe-0 to 4.5mass%Al alloys using electrical resistivity, Vickers hardness, and X-ray diffraction measurements. In all solution-treated and quenched alloys, only the beta phase was identified, thus confirming the suppression of omega-phase precipitation. The resistivity was found to increase monotonically with Al content, while the Vickers hardness decreased up to 3 mass% Al and then remained constant.
AB - Titanium is considered to be a ubiquitous element since it has the 9th-highest Clarke number of all elements. Iron and manganese can also be used as beta stabilizers for Ti alloys, and can be considered to be ubiquitous because of their 4th- and 11th-highest Clarke numbers, respectively. However, investigations into the behavior of Ti-Mn-Fe alloys during heat treatment have shown that in some alloys, the isothermal omega phase is precipitated. Because this phase can lead to brittleness, it is very important to prevent it from forming. It is well known that aluminum can suppress the precipitation of the isothermal omega phase. Thus, in the present study, we investigated the effect of Al content on the phase constitution and heat-treatment behavior of Ti-8.5mass%Mn-1mass%Fe-0 to 4.5mass%Al alloys using electrical resistivity, Vickers hardness, and X-ray diffraction measurements. In all solution-treated and quenched alloys, only the beta phase was identified, thus confirming the suppression of omega-phase precipitation. The resistivity was found to increase monotonically with Al content, while the Vickers hardness decreased up to 3 mass% Al and then remained constant.
KW - Aging
KW - Alpha phase
KW - Beta type
KW - Isothermal omega
KW - Low cost
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U2 - 10.4028/www.scientific.net/msf.783-786.562
DO - 10.4028/www.scientific.net/msf.783-786.562
M3 - Conference contribution
AN - SCOPUS:84904549446
SN - 9783038350736
T3 - Materials Science Forum
SP - 562
EP - 567
BT - THERMEC 2013
A2 - Mishra, B.
A2 - Ionescu, Mihail.
A2 - Chandra, T.
PB - Trans Tech Publications Ltd
T2 - 8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013
Y2 - 2 December 2013 through 6 December 2013
ER -