Enhancement of ductility in B2-type Zr-Co-Ni alloys with deformation-induced martensite and microcrack formation

M. Matsuda, Y. Iwamoto, Y. Morizono, S. Tsurekawa, K. Takashima, M. Nishida

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We investigated the microstructural evolution during tensile deformation of ZrCo and ternary Zr-Co-Ni alloys with the aim of clarifying the mechanism of enhancement of ductility in these alloys. Some long and slender microcracks were present perpendicular to the tensile direction on the surface of specimen with a nominal strain of 13%. There was an increase in not only the occurrence of microcracks but also the width of the microcracks with increasing nominal strain. The preferred sites for microcrack nucleation occurred at the grain boundaries and along the interface between the B2 parent phase and the Zr 2Co precipitates. Parts of the martensitic interface caused by tensile deformation acted as the preferred formation sites for the microcracks. Consequently, we consider that the remarkable enhancement of the ductility of the B2-type Zr-Co-Ni alloy is originated from the relaxation of stress concentration due to the microcrack formation, in addition to the transformation-induced plasticity associated with the deformation-induced martensite.

Original languageEnglish
Pages (from-to)45-50
Number of pages6
JournalIntermetallics
Volume36
DOIs
Publication statusPublished - Feb 18 2013

Fingerprint

Microcracks
Martensite
Ductility
Microstructural evolution
Plasticity
Stress concentration
Precipitates
Grain boundaries
Nucleation

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Enhancement of ductility in B2-type Zr-Co-Ni alloys with deformation-induced martensite and microcrack formation. / Matsuda, M.; Iwamoto, Y.; Morizono, Y.; Tsurekawa, S.; Takashima, K.; Nishida, M.

In: Intermetallics, Vol. 36, 18.02.2013, p. 45-50.

Research output: Contribution to journalArticle

Matsuda, M. ; Iwamoto, Y. ; Morizono, Y. ; Tsurekawa, S. ; Takashima, K. ; Nishida, M. / Enhancement of ductility in B2-type Zr-Co-Ni alloys with deformation-induced martensite and microcrack formation. In: Intermetallics. 2013 ; Vol. 36. pp. 45-50.
@article{acee02cd71d4496e838408b02f073a10,
title = "Enhancement of ductility in B2-type Zr-Co-Ni alloys with deformation-induced martensite and microcrack formation",
abstract = "We investigated the microstructural evolution during tensile deformation of ZrCo and ternary Zr-Co-Ni alloys with the aim of clarifying the mechanism of enhancement of ductility in these alloys. Some long and slender microcracks were present perpendicular to the tensile direction on the surface of specimen with a nominal strain of 13{\%}. There was an increase in not only the occurrence of microcracks but also the width of the microcracks with increasing nominal strain. The preferred sites for microcrack nucleation occurred at the grain boundaries and along the interface between the B2 parent phase and the Zr 2Co precipitates. Parts of the martensitic interface caused by tensile deformation acted as the preferred formation sites for the microcracks. Consequently, we consider that the remarkable enhancement of the ductility of the B2-type Zr-Co-Ni alloy is originated from the relaxation of stress concentration due to the microcrack formation, in addition to the transformation-induced plasticity associated with the deformation-induced martensite.",
author = "M. Matsuda and Y. Iwamoto and Y. Morizono and S. Tsurekawa and K. Takashima and M. Nishida",
year = "2013",
month = "2",
day = "18",
doi = "10.1016/j.intermet.2013.01.008",
language = "English",
volume = "36",
pages = "45--50",
journal = "Intermetallics",
issn = "0966-9795",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Enhancement of ductility in B2-type Zr-Co-Ni alloys with deformation-induced martensite and microcrack formation

AU - Matsuda, M.

AU - Iwamoto, Y.

AU - Morizono, Y.

AU - Tsurekawa, S.

AU - Takashima, K.

AU - Nishida, M.

PY - 2013/2/18

Y1 - 2013/2/18

N2 - We investigated the microstructural evolution during tensile deformation of ZrCo and ternary Zr-Co-Ni alloys with the aim of clarifying the mechanism of enhancement of ductility in these alloys. Some long and slender microcracks were present perpendicular to the tensile direction on the surface of specimen with a nominal strain of 13%. There was an increase in not only the occurrence of microcracks but also the width of the microcracks with increasing nominal strain. The preferred sites for microcrack nucleation occurred at the grain boundaries and along the interface between the B2 parent phase and the Zr 2Co precipitates. Parts of the martensitic interface caused by tensile deformation acted as the preferred formation sites for the microcracks. Consequently, we consider that the remarkable enhancement of the ductility of the B2-type Zr-Co-Ni alloy is originated from the relaxation of stress concentration due to the microcrack formation, in addition to the transformation-induced plasticity associated with the deformation-induced martensite.

AB - We investigated the microstructural evolution during tensile deformation of ZrCo and ternary Zr-Co-Ni alloys with the aim of clarifying the mechanism of enhancement of ductility in these alloys. Some long and slender microcracks were present perpendicular to the tensile direction on the surface of specimen with a nominal strain of 13%. There was an increase in not only the occurrence of microcracks but also the width of the microcracks with increasing nominal strain. The preferred sites for microcrack nucleation occurred at the grain boundaries and along the interface between the B2 parent phase and the Zr 2Co precipitates. Parts of the martensitic interface caused by tensile deformation acted as the preferred formation sites for the microcracks. Consequently, we consider that the remarkable enhancement of the ductility of the B2-type Zr-Co-Ni alloy is originated from the relaxation of stress concentration due to the microcrack formation, in addition to the transformation-induced plasticity associated with the deformation-induced martensite.

UR - http://www.scopus.com/inward/record.url?scp=84873671724&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84873671724&partnerID=8YFLogxK

U2 - 10.1016/j.intermet.2013.01.008

DO - 10.1016/j.intermet.2013.01.008

M3 - Article

AN - SCOPUS:84873671724

VL - 36

SP - 45

EP - 50

JO - Intermetallics

JF - Intermetallics

SN - 0966-9795

ER -