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Effects of quenching methods on shape memory properties of Cu-28Zn-3Al wt. % alloy produced by gravity casting<br />

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Title Statement Effects of quenching methods on shape memory properties of Cu-28Zn-3Al wt. % alloy produced by gravity casting<br />
 
Added Entry - Uncontrolled Name Setyani, Atik ; Universitas Indonesia
Setiawan, Ignatius Andre; Universitas Indonesia
Pertiwi, Dwita Ratu Kusuma; Universitas Indonesia
Sofyan, Bondan Tiara; Universitas Indonesia
PMDSU Research Grant from Kementerian Riset dan Teknologi/Badan Riset dan Inovasi Nasional Republik Indonesia with contract No: NKB-439/UN2.RST/HKP.05.00/2020.
 
Uncontrolled Index Term Metallurgical engineering
Shape memory alloy, Shape memory effect, Cu-Zn-Al, Quenching method, Martensite phase
 
Summary, etc. <p>In recent years, Cu-Zn-Al alloys are studied intensively due to their excellence in shape memory effect (SME), good mechanical properties, along with accessible production process and cost. Cu-Zn-Al Shape Memory Alloy easily form stabilization in martensite phase that leads to SME properties reduction, but can be minimized by applying alternative quenching methods. In this research, several quenching methods are proposed to minimize the phase stabilization of martensite. The Cu-28Zn-3Al alloy was produced by gravity casting and homogenized at 800 ℃ for 2h followed by air cooling. Furthermore, as-homogenized plate was betatized at 850 ℃ for 30 minutes and then subsequently quenched using three different methods: direct quench (DQ), up quench (UQ), and step quench (SQ). Morphology, phase transformation, hardness, and strain recovery characterization are examined using an optical microscope, SEM-EDS, XRD, DSC, Vickers, and bending tests. The results showed that the DQ and UQ samples consist of V-shape βˈ[M18R] martensite as a matrix and retained α[A1] as the second phase. The volume fraction ratio of βˈ[M18R]: α[A1] is (98.4:1.6) and (92.9:6.1) for DQ and UQ, respectively. However, the SQ sample did not indicate the presence of the martensite phase and did not show any recovery rate. Bending test showed that DQ and UQ had 27.2% and 36.3% of recovery rate, respectively.</p>
 
Publication, Distribution, Etc. Indian Journal of Engineering and Materials Sciences (IJEMS)
2022-05-11 17:13:21
 
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http://op.niscair.res.in/index.php/IJEMS/article/view/46040
 
Data Source Entry Indian Journal of Engineering and Materials Sciences (IJEMS); ##issue.vol## 29, ##issue.no## 1 (2022): IJEMS-FEBRUARY 2022
 
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