TY - JOUR
T1 - Optimisation of Heat Treatments on Shape Memory Effect of Cu-24Zn-3.65Al wt. % Alloy Produced by Gravity Casting
AU - Setyani, A.
AU - Novakusuma, A.
AU - Sofyan, B. T.
N1 - Publisher Copyright:
© 2023 American Institute of Physics Inc.. All rights reserved.
PY - 2023/7/21
Y1 - 2023/7/21
N2 - The Cu-Zn-Al alloy has become one of the prospective shape memory alloys (SMA). Its shape memory effect (SME) reported can be enhanced by applying appropriate heat treatment. Therefore, heat treatments with varied methods and media quenching are proposed to optimise SME in this research. The Cu-24Zn-3.65Al. wt. % alloy was produced by gravity casting and then homogenised at 800 ℃ for 2h, followed by air cooling. It was then betatized at 850 ℃ for 30 minutes, followed by two different quenching methods: direct quenching (DQ) and up quenching (UQ) using water and dry ice (WD) as well as saltwater and dry ice (SD) as the medium. The characterisation was performed by optical microscope, SEM-EDS, Vickers, DSC and bending test. The results show that DQ_WD and UQ_WD samples are consisted of β' martensite and retained α. In contrast, DQ_SD and UQ_SD produce a complete β' martensite phase. The bending test showed that UQ_SD has the highest SME 94%, followed by DQ_SD 84.5%, UQ_WD 73.47%, and DQ_WD 61.49%. The UQ method by using SD cooling media was found effective in increasing SME.
AB - The Cu-Zn-Al alloy has become one of the prospective shape memory alloys (SMA). Its shape memory effect (SME) reported can be enhanced by applying appropriate heat treatment. Therefore, heat treatments with varied methods and media quenching are proposed to optimise SME in this research. The Cu-24Zn-3.65Al. wt. % alloy was produced by gravity casting and then homogenised at 800 ℃ for 2h, followed by air cooling. It was then betatized at 850 ℃ for 30 minutes, followed by two different quenching methods: direct quenching (DQ) and up quenching (UQ) using water and dry ice (WD) as well as saltwater and dry ice (SD) as the medium. The characterisation was performed by optical microscope, SEM-EDS, Vickers, DSC and bending test. The results show that DQ_WD and UQ_WD samples are consisted of β' martensite and retained α. In contrast, DQ_SD and UQ_SD produce a complete β' martensite phase. The bending test showed that UQ_SD has the highest SME 94%, followed by DQ_SD 84.5%, UQ_WD 73.47%, and DQ_WD 61.49%. The UQ method by using SD cooling media was found effective in increasing SME.
UR - http://www.scopus.com/inward/record.url?scp=85176725683&partnerID=8YFLogxK
U2 - 10.1063/5.0114835
DO - 10.1063/5.0114835
M3 - Conference article
AN - SCOPUS:85176725683
SN - 0094-243X
VL - 2689
JO - AIP Conference Proceedings
JF - AIP Conference Proceedings
IS - 1
M1 - 070046
T2 - Sriwijaya International Conference on Engineering and Technology 2021, SICETO 2021
Y2 - 25 October 2021 through 26 October 2021
ER -