a포항공과대학교 항공재료연구센터,
b포항공과대학교 신소재공학과
c인하공업전문대학 금속재료과,
d포항산업과학연구원 재료공정연구소
aCenter of Aerospace Materials, POSTECH (Pohang University of Science and Technology), Pohang 790-784, Korea
bDepartment of Materials Science and Engineering, POSTECH (Pohang University of Science and Technology), Pohang 790-784, Korea
cDepartment of Metallurgical and Material Engineering, Inha Technical College, Incheon 402-751, Korea
dMaterials Research Division, RIST, Pohang 790-784, Korea
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