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Korean J. Met. Mater.
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Korean Journal of Metals and Materials
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알루미늄 5052-H32 합금과 6014-T4 합금의 저항 점 용접 시 용접성 및 미세조직 비교
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전현욱, 김재훈, 김원호, 천주용, 배기만, 이은경, 박영도, 지창욱
Korean J. Met. Mater.
2024;62(1):1-11. Published online 2023 Dec 29
DOI:
https://doi.org/10.3365/KJMM.2024.62.1.1
Abstract
This study was performed to compare the resistance spot weldability of Al 5052-H32 alloy and Al 6014-T4 alloy, and the cause of the differences in the weldability was investigated. In general, the surface of the aluminum alloy has an oxide film several nm thick, and local heat input is generated.....
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Korean J. Met. Mater.
2022;60(2):141-148. Published online 2022 Jan 12
DOI:
https://doi.org/10.3365/KJMM.2022.60.2.141
Abstract
A lead-free piezoelectric ceramic, (1-x)Ba(Zr
0.2
Ti
0.8
)O
3
-x(Ba
0.7
Ca
0.3
)TiO
3
(hereafter (1-x)BZT-xBCT), was investigated for functional device applications. Lead-free piezoelectric materials with high piezoelectric charge coefficients and voltage coefficients are indispensable for functional industrial applications. Piezoelectric ceramic specimens tend to shrink in size during the sintering process without melting. This study focused on this phenomenon.....
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Alloy 738 초내열합금 4 mm 두께 각관의 정밀주조 시 수축공 및 수축변위 해석 및 분석
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박명일, 김경민, 이영철, 이정석, 이재현, 유재현, 박상후, 최윤석
Korean J. Met. Mater.
2017;55(2):132-138. Published online 2017 Feb 2
DOI:
https://doi.org/10.3365/KJMM.2017.55.2.132
Abstract
Investment casting for the thin (4 mm thick) rectangular tube (40 mm wide, 80 mm high and 200 mm long) was carried out numerically and experimentally for Alloy 738, which is a precipitation-hardened Ni-base superalloy. Two types of rectangular tubes, one with a regular array (10 mm by 10 mm.....
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