In situ TEM observation of phase transformation in bulk metallic glass composites
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In: Materials Research Letters, Vol. 9.2021, No. 4, 17.01.2021, p. 190-195.
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TY - JOUR
T1 - In situ TEM observation of phase transformation in bulk metallic glass composites
AU - Sheng, Huaping
AU - Zhang, Long
AU - Zhang, Haifeng
AU - Wang, Jianbo
AU - Eckert, Jürgen
AU - Gammer, Christoph
N1 - Publisher Copyright: © 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
PY - 2021/1/17
Y1 - 2021/1/17
N2 - Transformation-induced plasticity is a fundamental solution for improving the ductility of bulk metallic glass composites (BMGCs). However, the underlying mechanism remains controversial. Here, by using in situ transmission electron microscopy, we present direct observation of the transformation dynamics from β/ω phase to α’ phase of the crystalline dendrites in a TiZrCuBe BMGC under uniaxial tensile deformation. The transformation redistributes the stress in the adjacent matrix, making interfacial regions potential preferential sites for shear band nucleation. The high density of nucleation sites is believed to promote the formation of shear band networks and enhance the ductility of BMGCs.
AB - Transformation-induced plasticity is a fundamental solution for improving the ductility of bulk metallic glass composites (BMGCs). However, the underlying mechanism remains controversial. Here, by using in situ transmission electron microscopy, we present direct observation of the transformation dynamics from β/ω phase to α’ phase of the crystalline dendrites in a TiZrCuBe BMGC under uniaxial tensile deformation. The transformation redistributes the stress in the adjacent matrix, making interfacial regions potential preferential sites for shear band nucleation. The high density of nucleation sites is believed to promote the formation of shear band networks and enhance the ductility of BMGCs.
KW - Bulk metallic glass composites
KW - phase transformation
KW - shear band nucleation
KW - stress redistribution
KW - transmission electron microscopy
UR - http://www.scopus.com/inward/record.url?scp=85099678205&partnerID=8YFLogxK
U2 - 10.1080/21663831.2020.1867919
DO - 10.1080/21663831.2020.1867919
M3 - Article
AN - SCOPUS:85099678205
VL - 9.2021
SP - 190
EP - 195
JO - Materials Research Letters
JF - Materials Research Letters
SN - 2166-3831
IS - 4
ER -
