In this study, solid solution heat treatment of consolidated nickel-based superalloy powders is carried out by hot isotactic pressing. The effects of the cooling rate of salt quenching, and air cooling on the microstructures and the mechanical properties of the specimens are analyzed . The specimen that is air cooled shows the formation of serrated grain boundaries due to their obstruction by the carbide particles. Moreover, the specimen that is salt quenched shows higher strength than the one that is air cooled due to the presence of fine and close-packed tertiary gamma prime phase. The tensile elongation at high temperatures improves due to the presence of grain boundary serrations in the specimen that is air cooled. On the contrary, the specimen that is salt quenched and consists of unserrated grain boundaries shows better creep properties than the air cooled specimen with the serrated grain boundaries, due to the negative creep phenomenon.

1. 서 론
 2. 실험방법
 3. 실험결과 및 고찰
 4. 결 론
 감사의 글
 References

• 전 찬(재료연구소 소재성형연구실) | Chan Jun
• 이영선(재료연구소 소재성형연구실) | Youngseon Lee
• 배병범(재료연구소 소재성형연구실) | Byeong Beom Bae
• 김홍규(국방과학연구소) | Hong-Kyu Kim
• 홍성석(국방과학연구소) | Seong Suk Hong
• 김동훈(국방과학연구소) | Donghoon Kim
• 윤존도(경남대학교 나노신소재공학과) | Jondo Yun
• 윤은유(재료연구소 소재성형연구실) | Eun Yoo Yoon