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Effect of EMS Process on the Primary Si Refinement, Tensile and Fatigue Properties of Hyper-eutectic Al-15wt.%Si Alloy
과공정 Al-15wt.%Si 합금의 Primary Si 미세화와 인장 및 피로 특성에 미치는 EMS 공정의 영향
Min-Seok Baek, Tae-Hoon Kang, Jong-Ho Kim, Jun-Pyo Park, Kwangjun Euh, Kee-Ahn Lee
백민석, 강태훈, 김종호, 박준표, 어광준, 이기안
Korean J. Met. Mater. 2022;60(5):360-369.   Published online 2022 Apr 22
DOI: https://doi.org/10.3365/KJMM.2022.60.5.360

This study investigated the effect of the electromagnetic stirring (EMS) process on the microstructure and mechanical properties of hyper-eutectic Al-15 wt.%Si alloy. The tensile and high-cycle fatigue properties of the EMS Al-15wt.%Si alloy were examined and compared with conventional direct chill (DC) cast alloy. The initial microstructure of the as-cast..... More

Corrosion Behaviors of the Eutectic Structure in Zn-Al-Mg Alloy Coated Steel in Chloride Containing Aqueous Environment
염수환경 내 Zn-Al-Mg 합금도금강재의 공정조직 부식거동
Jae-Won Lee, Se-Young Oh, Bora Park, Min-Suk Oh, Sung Jin Kim
이재원, 오세영, 박보라, 오민석, 김성진
Korean J. Met. Mater. 2020;58(9):610-616.   Published online 2020 Aug 19
DOI: https://doi.org/10.3365/KJMM.2020.58.9.610

To clearly understand the effect of the eutectic structure in the Zn-Al-Mg alloy coating on the corrosion behaviors in chloride containing aqueous environments, a bulk Zn-MgZn2 sample was fabricated by diffusion bonding process, and a variety of experiments, such as electrochemical polarization and galvanic corrosion measurements, salt spray tests, and..... More

                           Cited By 2
Characteristics of Electroless Sn Plating Electrolyte using a Choline Chloride-Based Ionic Liquid
Chieon Park, Bongyoung Yoo, Joonkyun Lee
Korean J. Met. Mater. 2018;56(9):645-651.   Published online 2018 Sep 5
DOI: https://doi.org/10.3365/KJMM.2018.56.9.645

In the present study, a choline chloride(ChCl)-based ionic liquid(IL) was used as an electrolyte to confirm the characteristics of electroless tin plating. The effect of the type of additive and reducing agent, as well as the addition of complexing agent and water, on the properties of the ChCl-based IL, including..... More

                           Cited By 2
An Investigation of the Effect of Gray Iron Brake Disc Microstructure on Brake Judder
회주철 브레이크 디스크의 미세조직이 브레이크 떨림에 미치는 영향 연구
Min-Gyun Chung, Jae-Young Lee, Jin-Yong Choi, Yoon-Cheol Kim, Seong Jin Kim
정민균, 이재영, 최진용, 김윤철, 김성진
Korean J. Met. Mater. 2017;55(10):689-694.   Published online 2017 Sep 28
DOI: https://doi.org/10.3365/KJMM.2017.55.10.689

Brake judder is a kind of low-frequency brake vibration and noise phenomenon generated during braking. Various types of judder have been reported, depending on the particular generation mechanism. However, the correlation between the microstructure of gray iron brake discs and judder has seldom been discussed in the literature. In this..... More

Enhanced Mechanical Properties by Directional Solidification and Cold Drawing in Cu Added Zn-Al Alloys
Cu가 첨가된 Zn-Al 합금에서 일방향응고 및 냉간인발에 따른 기계적 특성 향상
Hae Chang Jeong, Min Soo Kim, Jee Hyuk Ahn, Sung Hwan Lim, Seung Zeon Han, Jehyun Lee, Kwang Ho Kim
정해창, 김민수, 안지혁, 임성환, 한승전, 이재현, 김광호
Korean J. Met. Mater. 2017;55(8):529-536.   Published online 2017 Aug 1
DOI: https://doi.org/10.3365/KJMM.2017.55.8.529

The lamellar structure of two phases, the Zn-rich and Al-rich phases, is formed in a Zn-5 wt% Al eutectic alloy. In order to study the effect of microstructural changes on the tensile properties of eutectic Zn-Al binary alloy, Zn-Al and Zn-Al-Cu alloys were directionally solidified at a growth rate of..... More

Influence of Ultrasonic Melt Treatment and Cooling Rates on the Microstructural Development and Elevated Temperature Mechanical Properties of a Hypereutectic Al-18Si-4Cu-3Ni Piston Alloy
초음파 용탕 처리 및 냉각속도가 Al-18Si-4Cu-3Ni 피스톤용 합금의 미세조직과 고온인장특성에 미치는 영향
Jea-Hee Yoon, Young-Hee Cho, Jae-Gil Jung, Jung-Moo Lee, Ik Min Park
윤재희, 조영희, 정재길, 이정무, 박익민
Korean J. Met. Mater. 2017;55(6):396-404.   Published online 2017 Jun 1
DOI: https://doi.org/10.3365/KJMM.2017.55.6.396

The influence of ultrasonic melt treatment (UST) combined with a change in cooling rates on the microstructure and elevated temperature mechanical properties of a hypereutectic Al-18Si-4Cu-3Ni piston alloy was investigated. Microstructural observation confirmed that UST effectively refined the sizes of primary Si and intermetallic compounds (e.g. ε-Al3Ni) while promoting their..... More

         Cited By 2
The Effect of Ultrasonic Melt Treatment on the Microstructure and Mechanical Properties of Al-7Si-0.35Mg Casting Alloys
초음파 용탕 처리가 Al-7Si-0.35Mg 알루미늄 합금의 미세조직 및 기계적 특성에 미치는 영향
Soo-Bae Kim, Young-Hee Cho, Jung-Moo Lee, Jae-Gil Jung, Su Gun Lim
김수배, 조영희, 이정무, 정재길, 임수근
Korean J. Met. Mater. 2017;55(4):240-246.   Published online 2017 Apr 6
DOI: https://doi.org/10.3365/KJMM.2017.55.4.240

The effect of ultrasonic melt treatment (UST) on the microstructure and mechanical properties of Al-7Si-0.35Mg (A356) casting alloys was investigated. The particular aim of this study was to analyze the mechanism involved in the strengthening of the A356 alloys when fabricated by UST. The UST had little effect on the..... More

         Cited By 5
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