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Effect of Heat Treatment on the Microstructure and Mechanical Properties of W-7Ni-3Fe Tungsten Heavy Alloy Manufactured by Metal Injection Molding Process
Metal Injection Molding 공정으로 제조된 W-7Ni-3Fe 텅스텐 중합금의 미세조직 및 기계적 특성에 미치는 열처리의 영향
Seong-June Youn, Yeun-Ah Joo, Tae-Shik Yoon, Kee-Ahn Lee
윤성준, 주연아, 윤태식, 이기안
Korean J. Met. Mater. 2018;56(10):727-733.   Published online 2018 Oct 5
DOI: https://doi.org/10.3365/KJMM.2018.56.10.727

Abstract
This study investigated the microstructure and room temperature mechanical properties of W-7Ni-3Fe (wt%) tungsten heavy alloy (as-fabricated) which was manufactured by metal injection molding (MIM). To identify the effect of heat treatment on the W-7Ni-3Fe alloy, its properties were compared after heattreatment (1,100 oC for 1 hour) in vacuum atmosphere...... More

                        
Tensile Properties at Room and Elevated Temperatures and High-Cycle Fatigue Properties of Extruded AZ80 and TAZ711 Alloys
AZ80과 TAZ711 마그네슘 압출재의 상온 및 고온 인장 특성과 고주기 피로 특성
Sang Won Lee, Sang-Hoon Kim, Sung Hyuk Park
이상원, 김상훈, 박성혁
Korean J. Met. Mater. 2018;56(10):699-707.   Published online 2018 Oct 5
DOI: https://doi.org/10.3365/KJMM.2018.56.10.699

Abstract
The microstructure, tensile properties at room and elevated temperatures, and high-cycle fatigue behavior of an extruded Mg-7Sn-1Al-1Zn (TAZ711) alloy were investigated in comparison with those of an Mg-8Al-0.5Zn (AZ80) alloy extruded under the same conditions. The extruded AZ80 alloy exhibited a fully recrystallized structure, whereas the extruded TAZ711 alloy had..... More

                        
Effects of Manufacturing Conditions on Tensile Fracture Behaviors in Hyper-Eutectoid Steel Wires
과공석 강선에서 공정조건이 인장파단 거동에 미치는 영향
Kang Suk An, Jung Hoon Park, Won Jong Nam
안강석, 박정훈, 남원종
Korean J. Met. Mater. 2018;56(3):187-196.   Published online 2018 Mar 6
DOI: https://doi.org/10.3365/KJMM.2018.56.3.187

Abstract
This study investigated the effects of manufacturing conditions, such as patenting temperature and drawing strains, on the tensile fracture behaviors, especially on reduction of area (RA), of hyper-eutectoid steel wire. Steel wires with the chemical compositions of Fe-0.92C-1.3Si-0.6Mn-0.3Cr (wt%), were austenitized at 900 °C for 3 min and isothermally transformed..... More

      
Effect of Al Addition on the Microstructure, Tensile Properties, and Bendability of Extruded Mg-7Sn-1Zn Alloy
Al 첨가가 Mg-7Sn-1Zn 합금 압출재의 미세조직과 인장 및 굽힘 특성에 미치는 영향
Sang-Hoon Kim, Jong Un Lee, Ye Jin Kim, Jae Ok Choi, Jeong-Hun Lee, Sung Hyuk Park
김상훈, 이종언, 김예진, 최재옥, 이정훈, 박성혁
Korean J. Met. Mater. 2018;56(1):40-48.   Published online 2018 Jan 1
DOI: https://doi.org/10.3365/KJMM.2018.56.1.40

Abstract
The effect of Al addition on the microstructure and mechanical properties of extruded Mg-Sn based alloy is investigated by adding 1 wt% Al to the Mg-7Sn-1Zn alloy and indirectly extruding the billets with and without the Al addition. The Al addition promotes dynamic recrystallization (DRX) behaviour during hot extrusion, which..... More

         Cited By 5
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

Abstract
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 1
Effect of Annealing Temperature on the Microstructure, Tensile Properties, and Fracture Behavior of Cold-Rolled High-Mn Light-Weight Steels
고망간 경량철강 냉연판재의 미세조직, 인장특성 및 파괴거동에 미치는 어닐링 온도의 영향
Jae-hyun Lee, Seong-Jun Park, Joonoh Moon, Jun-Yun Kang, Jun-Young Park, Tae-Ho Lee, Kyung Mox Cho
이재현, 박성준, 문준오, 강전연, 박준영, 이태호, 조경목
Korean J. Met. Mater. 2017;55(5):363-371.   Published online 2017 May 9
DOI: https://doi.org/10.3365/KJMM.2017.55.5.363
Abstract
The effects of the annealing temperature on the microstructure and tensile properties of cold-rolled light-weight steels are investigated using two Fe-30Mn-xAl-0.9C alloys that contain different Al content. The initial alloy microstructure is composed of a single austenite or a mixture of austenite and ferrite depending on the nominal aluminum content.... More
         Cited By 3
(Effect of Stress Magnitude on the Tensile Properties of Damaged Damping Alloy Under Fatigue Stress)
Effect of Stress Magnitude on the Tensile Properties of Damaged Damping Alloy Under Fatigue Stress

Received 2018 Oct 8     Accepted 2018 Nov 29     Published online 2019 Jan 8
Abstract
This study was carried out to investigate the effect of fatigue stress magnitude on the tensile properties of the damaged Fe – 22Mn – 12Cr – 3Ni – 2Si - 4Co damping alloy under various fatigue stress magnitudes. α and ε -martensite were formed by fatigue stress in the Fe... More
      
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