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Effect of Alloying Elements and Microstructure on the Dynamic Strain Aging Behavior of 1.25Cr-0.5Mo and 2.25Cr-1Mo Steels
1.25Cr-0.5Mo과 2.25Cr-1Mo 강의 동적 변형시효 거동에 미치는 합금원소 및 미세조직의 영향
Yo Seob Lee, Ho Jung Lee, Jong Hyeon Lee
이요섭, 이호중, 이종현
Korean J. Met. Mater. 2021;59(11):769-780.   Published online 2021 Oct 28
DOI: https://doi.org/10.3365/KJMM.2021.59.11.769

Abstract
The effect of alloying elements and microstructure on the dynamic strain aging (DSA) behavior of 1.25Cr-0.5Mo (P11, ASTM 335Gr.P11) and 2.25Cr-1Mo (P22, ASTM 335Gr.P22) steels was investigated. For both steels, different cooling conditions such as air-cooling (AC) and oil-quenching (OQ) were applied. Tensile tests were conducted in the temperature range..... More

                           Cited By 1
Carburizing Behavior of AISI 4115 Steel According to the Flow Rates of Acetylene in Vacuum Carburizing
AISI 4115 강의 진공 침탄 시 아세틸렌 유량에 따른 침탄 거동
Gi-hoon Kwon, Kyoungil Moon, Young-Kook Lee, Minsu Jung
권기훈, 문경일, 이영국, 정민수
Korean J. Met. Mater. 2020;58(9):617-625.   Published online 2020 Aug 13
DOI: https://doi.org/10.3365/KJMM.2020.58.9.617

Abstract
The vacuum carburizing behavior of AISI 4115 steel according to acetylene flow rates (1, 5, 10, 20, 30, 40, and 50 sccm) and temperatures (900, 950, and 1000 oC) was quantitatively investigated through microstructure, carbon concentration and hardness analyses. As the acetylene flow rate increased, the penetration rate of carbon..... More

                        
Nanostructuring Behavior of NiCrBSi and CoCrWC Thermal Spray Coatings Formed by Temperature-Controlled Laser Heat Treatment
온도 제어형 레이저 열처리에 따른 NiCrBSi 및 CoCrWC 용사 코팅층의 나노구조 형성 거동
Eun-Joon Chun
천은준
Korean J. Met. Mater. 2020;58(4):247-256.   Published online 2020 Mar 10
DOI: https://doi.org/10.3365/KJMM.2020.58.4.247

Abstract
.For surface hardening of a continuous casting mold component, a thermal spray coating of NiCrBSi (Metco-16C) and CoCrWC (Stellite-1) was performed followed by laser heat treatment of the coatings. To support selective modification of the thermal spray coating, a metallurgically determined surface temperature was maintained during the laser heat treatment,..... More

                           Cited By 3
Microstructural Evolutions of 22Cr-9Mo-3Fe-4Nb Nickel-Base Superalloy During Low Cycle Fatigue
22Cr-9Mo-3Fe-4Nb 니켈기 초내열합금의 저주기 피로에 따른 미세조직변화
Youngseok Song, Jinik Suk, Chung Yun Kang
송영석, 석진익, 강정윤
Korean J. Met. Mater. 2017;55(9):609-614.   Published online 2017 Aug 30
DOI: https://doi.org/10.3365/KJMM.2017.55.9.609

Abstract
A new Ni based superalloy with high fatigue resistance and fine grain was considered as a material for high-pressure buckets in fossil fuel power plants. Since such buckets are usually exposed to extreme operating conditions, low cycle fatigue tests were conducted to understand the microstructure evolution of the material during..... More

      
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