TY - JOUR
T1 - Enhancing the Hardness of Mg-9Al-1Zn Cast Alloy by Solution Treatment
AU - Putra, Adi Ganda
AU - Manaf, Azwar
AU - Anawati, Anawati
N1 - Funding Information:
The authors gratefully acknowledge the support of the Postgraduate Program of Materials Science Universitas Indonesia for the research facilities. We are also thankful for the financial support provided by the Directorate of Research and Community Service Universitas Indonesia under program Grants of International Publication Indexed for Final Project Student 2018 (PITTA 2018) with contract No. 2238/UN2.R3.1/HKP.05.00/2018.
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2019/1/1
Y1 - 2019/1/1
N2 -
Magnesium alloys are lightweight materials that have a great potential to be developed because the alloy can reduce the energy consumption and total weight. The alloy is made of magnesium metal as a primary component characterized by a soft and mechanically low-strength. The addition of aluminium in Mg-Al system will form Mg
17
Al
12
particles causing grain refining the effect of the α-Mg matrix. Similarly, the addition of Zn in Mg-Zn system increases the strength and hardness of the alloy. Hence, the combined addition of Al and Zn in Mg-Al-Zn system would be interesting for automotive component applications. In this study, we have carried out the casting process for Mg-9Al-1Zn (wt. %) through a gravity of the metal mold with air cooling method. The cast alloy designated as Mg9Al1Zn alloy received a solution treatment at temperature of 415 °C for 2 hours. The microstructure observation for the cast alloy showed the presence of α-Mg as a matrix with the largest fraction and β-Mg
17
Al
12
phase as a precipitate. The microstructure also showed the presence of pores indicated by black colour. We have also undertaken microanalysis to each phase present in the sample by EDS that detected all elements. The result of Hardness evaluation confirmed that the solution treated as-cast alloys possessed the hardness value of 65.21. The VHN significantly enhanced when compared with that of original cast-alloy which was only 73.02 VHN. The enhancement of the hardness is discussed in relation with processing method and microstructure development after a solution treatment.
AB -
Magnesium alloys are lightweight materials that have a great potential to be developed because the alloy can reduce the energy consumption and total weight. The alloy is made of magnesium metal as a primary component characterized by a soft and mechanically low-strength. The addition of aluminium in Mg-Al system will form Mg
17
Al
12
particles causing grain refining the effect of the α-Mg matrix. Similarly, the addition of Zn in Mg-Zn system increases the strength and hardness of the alloy. Hence, the combined addition of Al and Zn in Mg-Al-Zn system would be interesting for automotive component applications. In this study, we have carried out the casting process for Mg-9Al-1Zn (wt. %) through a gravity of the metal mold with air cooling method. The cast alloy designated as Mg9Al1Zn alloy received a solution treatment at temperature of 415 °C for 2 hours. The microstructure observation for the cast alloy showed the presence of α-Mg as a matrix with the largest fraction and β-Mg
17
Al
12
phase as a precipitate. The microstructure also showed the presence of pores indicated by black colour. We have also undertaken microanalysis to each phase present in the sample by EDS that detected all elements. The result of Hardness evaluation confirmed that the solution treated as-cast alloys possessed the hardness value of 65.21. The VHN significantly enhanced when compared with that of original cast-alloy which was only 73.02 VHN. The enhancement of the hardness is discussed in relation with processing method and microstructure development after a solution treatment.
UR - http://www.scopus.com/inward/record.url?scp=85065669134&partnerID=8YFLogxK
U2 - 10.1088/1757-899X/515/1/012088
DO - 10.1088/1757-899X/515/1/012088
M3 - Conference article
AN - SCOPUS:85065669134
SN - 1757-8981
VL - 515
JO - IOP Conference Series: Materials Science and Engineering
JF - IOP Conference Series: Materials Science and Engineering
IS - 1
M1 - 012088
T2 - International Conference on Condensed Matters and Advanced Materials 2018, IC2MAM 2018
Y2 - 5 September 2018
ER -
