Changes in the mechanical properties and microstructure of an IN 939 W alloy according to the sintering heating rate were evaluated. IN 939 W alloy samples were fabricated by spark plasma sintering. The phase fraction, number density, and mean radius of the IN 939W alloy were calculated using a thermodynamic calculation. A universal testing machine and micro-Vickers hardness tester were employed to confirm the mechanical properties of the IN 939W alloy. X-ray diffraction, optical microscopy, field-emission scanning electron microscopy, Cs-corrected-field emission transmission electron microscopy, and energy dispersive X-ray spectrometry were used to evaluate the microstructure of the alloy. The rapid sintering heating rate resulted in a slightly dispersed γ' phase and chromium oxide. It also suppressed the precipitation of the η phase. These helped to reinforce the mechanical properties.

Abstract
1. 서 론
2. 실험 방법
3. 결과 및 고찰
4. 결 론
Acknowledgements
References

• 전준협(전북대학교 신소재공학부) | Junhyub Jeon (Division of Advanced Materials Engineering, Research Center for Advanced Materials Development, Jeonbuk National University, Jeonju 54896, Republic of Korea)
• 이준호(전북대학교 신소재공학부) | Junho Lee (Division of Advanced Materials Engineering, Research Center for Advanced Materials Development, Jeonbuk National University, Jeonju 54896, Republic of Korea)
• 서남혁(전북대학교 신소재공학부) | Namhyuk Seo (Division of Advanced Materials Engineering, Research Center for Advanced Materials Development, Jeonbuk National University, Jeonju 54896, Republic of Korea)
• 손승배(전북대학교 신소재공학부) | Seung Bae Son (Division of Advanced Materials Engineering, Research Center for Advanced Materials Development, Jeonbuk National University, Jeonju 54896, Republic of Korea)
• 정재길(전북대학교 신소재공학부) | Jae-Gil Jung (Division of Advanced Materials Engineering, Research Center for Advanced Materials Development, Jeonbuk National University, Jeonju 54896, Republic of Korea)
• 이석재(전북대학교 신소재공학부) | Seok-Jae Lee (Division of Advanced Materials Engineering, Research Center for Advanced Materials Development, Jeonbuk National University, Jeonju 54896, Republic of Korea) Corresponding author