Formation of needle-like MC carbide at or near incoherent twin boundary in IN740H Ni-based superalloy

Title
Formation of needle-like MC carbide at or near incoherent twin boundary in IN740H Ni-based superalloy
Authors
정우상서진유심재혁김동익김병규이상혁이승용
Issue Date
2020-01
Publisher
Journal of alloys and compounds
Citation
VOL 813-152222-7
Abstract
During aging at 900  °C for 100  h of IN740H Ni-based superalloy, unexpected needle-like MC carbide formed at or near incoherent twin boundary having a twin relationship with surrounding matrix. Similar to the known needle-like M23C6 precipitation, the nucleation and growth of MC carbide in needle-like morphology resulted from emission of Shockley partial dislocations and inherent directional stress field originated from incoherent twin boundary, respectively. Also, this precipitation process essentially gave rise to the twin relationship with its surrounding matrix.
URI
http://pubs.kist.re.kr/handle/201004/70129
ISSN
0925-8388
Appears in Collections:
KIST Publication > Article
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