TY - JOUR
T1 - Effect of Ti Addition to Age Hardening Response of Al-10Zn-6MgxTi Alloy Produced by Squeeze Casting
AU - Nurcahyaningsih, Dwi Ayu
AU - Wijanarko, Risly
AU - Angela, Irene
AU - Tiara Sofyan, Bondan
N1 - Publisher Copyright:
© The Authors, published by EDP Sciences, 2018.
PY - 2018/8/6
Y1 - 2018/8/6
N2 -
This research focused on investigating the effects of Ti addition on the age hardening response of Al 7xxx alloy for Organic Rankine Cycle (ORC) turbine impeller application in power plant generators. Al-10Zn-6Mg wt. % alloys were produced by squeeze casting with 0.02, 0.05, and 0.25 wt. % Ti addition. As-cast samples were homogenized at 400 °C for 4 h. Solution treatment was conducted at 440 °C for 1 h, followed by quenching and ageing at 130 °C for 200 h. Age hardening result was observed using Rockwell B hardness measurement. Other characterizations included impact testing, STA, optical microscopy, and SEM-EDS. Results showed that the addition of Ti in all content variations increased the as-cast hardness due to the diminution of secondary dendrite arm spacing (SDAS) values of the alloy. Ageing at 130 °C strengthened the alloys, however the addition of Ti was not found to affect neither peak hardness nor impact values of the alloy. Identities of second phases formed during solidification were found to be T (Mg
32
(Al,Zn)
49
), β (Al
8
Mg
5
), and TiAl
3
, while precipitates produced during ageing were GP Zone, η′, and η (MgZn
2
).
AB -
This research focused on investigating the effects of Ti addition on the age hardening response of Al 7xxx alloy for Organic Rankine Cycle (ORC) turbine impeller application in power plant generators. Al-10Zn-6Mg wt. % alloys were produced by squeeze casting with 0.02, 0.05, and 0.25 wt. % Ti addition. As-cast samples were homogenized at 400 °C for 4 h. Solution treatment was conducted at 440 °C for 1 h, followed by quenching and ageing at 130 °C for 200 h. Age hardening result was observed using Rockwell B hardness measurement. Other characterizations included impact testing, STA, optical microscopy, and SEM-EDS. Results showed that the addition of Ti in all content variations increased the as-cast hardness due to the diminution of secondary dendrite arm spacing (SDAS) values of the alloy. Ageing at 130 °C strengthened the alloys, however the addition of Ti was not found to affect neither peak hardness nor impact values of the alloy. Identities of second phases formed during solidification were found to be T (Mg
32
(Al,Zn)
49
), β (Al
8
Mg
5
), and TiAl
3
, while precipitates produced during ageing were GP Zone, η′, and η (MgZn
2
).
KW - Ageing
KW - Al-Zn-Mg
KW - Grain refining
KW - MgZn2
KW - Ti addition
UR - http://www.scopus.com/inward/record.url?scp=85053154439&partnerID=8YFLogxK
U2 - 10.1051/matecconf/201818602009
DO - 10.1051/matecconf/201818602009
M3 - Conference article
AN - SCOPUS:85053154439
SN - 2261-236X
VL - 186
JO - MATEC Web of Conferences
JF - MATEC Web of Conferences
M1 - 02009
T2 - 7th International Conference on Engineering Mathematics and Physics, ICEMP 2018
Y2 - 15 June 2018 through 18 June 2018
ER -