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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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In this work, various electron microscopy and analysis techniques were used to investigate the microstructural evolution of a 9% Cr tempered martensite ferritic (TMF) steel T91 upon ultrasonic nanocrystalline surface modification (UNSM) treatment. The micro-dimpled surface was analyzed by scanning electron microscopy. The characteristics of plastic deformation and gradient microstructure of the UNSM treated specimens were clearly revealed by crystal orientation mapping of electron backscatter diffraction (EBSD), with flexible use of the inverse pole figure, image quality, and grain boundary misorientation images. Transmission electron microscope (TEM) observation of the specimens at different depths showed the formation of dislocations, dense dislocation walls, subgrains, and grains in the lower, middle, upper, and top layers of the treated specimens. Refinement of the M23C6 precipitates was also observed, the size and the number density of which were found to decrease as depth from the top surface decreased. The complex microstructure and microstructural evolution of the TMF steel samples upon the UNSM treatment were well-characterized by combined use of EBSD and TEM techniques.
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참고문헌 (20)
참고문헌 신청
Ahn D / 2012 / Effect of ultrasonic nano-crystalline surface modification on the microstructural evolution and mechanical properties of Al5052 alloy / Surf. Interface Anal 44
Amanov A / 2012 / Microdimpled surface by ultrasonic nanocrystal surface modification and its tribological effects / Wear 286-287 : 136 ~ 144
Chen Y / 2006 / Corrosion behavior of ferriticmartensitic steel T91 in supercritical water / Corros. Sci 48 : 2843 ~ 2854
Cherif A / 2010 / Effects of ultrasonic nanocrystal surface modification (UNSM) on residual stress state and fatigue strength of AISI 304 / J. Mater. Eng. Perform 19 : 282 ~
He Y / 2011 / Microstructural evolution of X20CrMoV12.1 steel upon long-term on-site exposure in power plants / Adv. Sci. Lett 4 : 1416 ~ 1423
Amanov A / 2012 / Microdimpled surface by ultrasonic nanocrystal surface modification and its tribological effects / Wear 286-287 : 136 ~ 144
Chen Y / 2006 / Corrosion behavior of ferriticmartensitic steel T91 in supercritical water / Corros. Sci 48 : 2843 ~ 2854
Cherif A / 2010 / Effects of ultrasonic nanocrystal surface modification (UNSM) on residual stress state and fatigue strength of AISI 304 / J. Mater. Eng. Perform 19 : 282 ~
He Y / 2011 / Microstructural evolution of X20CrMoV12.1 steel upon long-term on-site exposure in power plants / Adv. Sci. Lett 4 : 1416 ~ 1423
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