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Effect of Low Transformation Temperature Welding Consumable on Microstructure, Mechanical Properties and Residual Stress in Welded Joint of A516 Carbon Steel
Sungki Choi, Junsang Lee, Jae-Yik Lee, Seung-Kyun Kang, Young-Cheon Kim, Seung-Joon Lee, Dongil Kwon
Korean J. Met. Mater. 2021;59(8):524-532.   Published online 2021 Jul 5
DOI: https://doi.org/10.3365/KJMM.2021.59.8.524

The microstructure, mechanical properties and residual stress of flux-cored arc welded ASTM A516-70N carbon steel using a Mn-based low-temperature transformation (LTT) welding consumable were investigated. Microstructural analysis with X-ray diffraction, an electron backscattered diffractometer and a field-emission scanning electron microscope showed that the LTT weld metal was made up of..... More

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Mechanical Behavior of Spin-Coated Sb<sub>2</sub>S<sub>3</sub> light Absorption Thin Films
스핀 코팅법에 의한 Sb2S3 광흡수층 박막의 기계적 거동
Mao Zhang, Dayoung Yoo, Youngseon Jeon, Dongyun Lee
장마오, 유다영, 전영선, 이동윤
Korean J. Met. Mater. 2021;59(1):1-7.   Published online 2021 Jan 5
DOI: https://doi.org/10.3365/KJMM.2021.59.1.1

To measure the mechanical properties of Sb2S3, a two-component compound semiconductor used in the light absorption layer of a solar cell, Sb2S3 thin films were formed on FTO glass using the spin coating method. The spin-coated Sb2S3 thin films were heat-treated at 200 oC in an Ar atmosphere for up..... More

A Further Study on Knoop Indentation Plastic Deformation for Evaluating Residual Stress
Woojoo Kim, Kyungyul Lee, Jong-hyoung Kim, Young-Cheon Kim, Dongil Kwon
Korean J. Met. Mater. 2020;58(8):515-521.   Published online 2020 Jul 27
DOI: https://doi.org/10.3365/KJMM.2020.58.8.515

A method for evaluating residual stress using an instrumented indentation test was developed some decades ago. More recently, another method was developed, using a Knoop indenter. The conversion factor ratio, which is one of the key factors in the evaluation algorithm, has been taken to be 0.34, although this value..... More

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Measurement of Intrinsic Hardness of Deposited Chromium Thin Films by Nanoindentation Method and Influencing Factors
나노인덴테이션 방법으로 크롬 박막의 고유경도를 측정하는 방법과 영향 인자
Young-Joon Kang, Ju-Hwan Baeg, Hyun Park, Young-Rae Cho
강영준, 백주환, 박현, 조영래
Korean J. Met. Mater. 2020;58(3):207-215.   Published online 2020 Mar 5
DOI: https://doi.org/10.3365/KJMM.2020.58.3.207

Materials with very small dimensions exhibit different physical and mechanical properties compared to their bulk counterparts. This becomes significantly important for the thin films that are widely used as components in micro-electronics and functional materials. In this study, a chromium (Cr) thin film was deposited on a silicon (Si) wafer..... More

                           Cited By 2
Characterization of Viscoelastic Behavior of Poly(dimethylsiloxane) by Nanoindentation
Jong-hyoung Kim, Jinwoo Lee, Woojoo Kim, Jongheon Kim, Seung-Kyun Kang, Dongil Kwon
Korean J. Met. Mater. 2019;57(5):289-294.   Published online 2019 May 5
DOI: https://doi.org/10.3365/KJMM.2019.57.5.289

In this study, we characterize the viscoelastic behavior of polymers using nanoindentation. We applied the indentation representative stress approach and elastic solution to the Maxwell model and determined that there was a linear relationship between the inverses of the initial unloading stiffness and indentation unloading rate. From nanoindentation tests with..... More

                           Cited By 4
Effect of Cr Electroplating Layer Thickness on the Tensile and High Cycle Fatigue Properties of AISI 1045 Steel
AISI 1045 강의 인장 및 고주기 피로 특성에 미치는 Cr 도금층 두께의 영향
Gi-Su Ham, Yeon-Ji Kang, Hyung-Jun Kim, Sang-Hoon Yoon, Kee-Ahn Lee
함기수, 강연지, 김형준, 윤상훈, 이기안
Korean J. Met. Mater. 2019;57(3):138-145.   Published online 2019 Feb 14
DOI: https://doi.org/10.3365/KJMM.2019.57.3.138

This study investigated and compared the tensile and high-cycle fatigue properties of AISI 1045 steel and Cr electroplated AISI 1045 steel. First, tensile and fatigue specimens were machined from AISI 1045 steel (substrate), and two kinds of Cr electroplating layers with different layer thickness were applied. The substrate, AISI 1045..... More

                           Cited By 3
Effect of Oxi-Nitrocarburizing on the Microstructure, Nanohardness and Corrosion Properties for Low Carbon Steel
산질화처리가 저탄소강의 미세조직과 나노경도 및 부식특성에 미치는 영향
Young-Wook Cho, Jong-Ho Won, Jeong-Ho Woo, Sang-Ho Yu, Young-Rae Cho
조영욱, 원종호, 우정호, 유상호, 조영래
Korean J. Met. Mater. 2018;56(4):289-295.   Published online 2018 Apr 5
DOI: https://doi.org/10.3365/KJMM.2018.56.4.289

Oxi-nitrocarburizing treatment was performed to improve the anti-corrosion and anti-wear properties of low carbon steels. The oxi-nitrocarburizing was carried out in 2 steps: a gas nitrocarburizing step at 560 ℃ and an oxidation step at 550 ℃ for 30 min with steamed water. The mechanical and chemical properties of the..... More

         Cited By 1
Influence of Nickel Thickness and Annealing Time on the Mechanical Properties of Intermetallic Compounds Formed between Cu-Sn Solder and Substrate
Cu-Sn계 솔더와 기판 사이의 Ni층의 두께와 열처리 시간에 따른 금속간화합물의 기계적 특성
Yiseul Kim, Jeehye Kwon, Dayoung Yoo, Sungkyu Park, Dajeong Lee, Dongyun Lee
김이슬, 권지혜, 유다영, 박성규, 이다정, 이동윤
Korean J. Met. Mater. 2017;55(3):165-172.   Published online 2017 Mar 3
DOI: https://doi.org/10.3365/KJMM.2017.55.3.165

Intermetallic compounds (IMCs) developed on the interface between a solder alloy and its bonding pads are an important factor in the failure of electronic circuits. In this study, the mechanical behaviors of the IMCs formed in the Cu-Ni-Sn ternary alloy system are investigated. Presumably, Ni can act as a diffusion..... More

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