Title:
WELDED STRUCTURE AND Fe-Mn-Cr-Ni-Si-BASED ALLOY
Document Type and Number:
WIPO Patent Application WO/2021/261067
Kind Code:
A1
Abstract:
The present invention provides a welded structure that has excellent fatigue characteristics equivalent to those of steel base material, even in a welded section. This welded structure is formed by welding a plurality of pieces of a steel material with a welding material, the structure being characterized in that: the composition of a welding metal is in the FA solidifying mode; the metal organization of a base material, a welding-heat-affected section, and the welding metal before repeated elastic deformation includes at least 85% by volume and less than 100% by volume of γ-austenite phase, while the metal composition immediately before fatigue failure or at the time of fatigue failure includes at least 10% by volume and less than 90% by volume of deformation-induced ε-martensite phase, at least 0% by volume and less than 12% by volume of deformation-induced α'-martensite phase, and at least 10% by volume and less than 90% by volume of residual γ-austenite phase; when undergoing repeated elastic deformation, the metal organization before repeated elastic deformation changes to the metal organization immediately before fatigue failure or at the time of fatigue failure; and, in response to successive repeated elastic deformation, a deformation-induced martensite transformation from γ-austenite phase to ε-martensite phase and a transformation that is the reverse of this are repeated, and the volume ratio of deformation-induced ε-martensite phase successively increases.
Inventors:
SAWAGUCHI TAKAHIRO (JP)
NAKAMURA TERUMI (JP)
ARAKANE GORO (JP)
TAKAMORI SUSUMU (JP)
YOSHINAKA FUMIYOSHI (JP)
KUSHIBE ATSUMICHI (JP)
INOUE YASUHIKO (JP)
MOTOMURA SUSUMU (JP)
OSUGA FUMIAKI (JP)
NAKAMURA TERUMI (JP)
ARAKANE GORO (JP)
TAKAMORI SUSUMU (JP)
YOSHINAKA FUMIYOSHI (JP)
KUSHIBE ATSUMICHI (JP)
INOUE YASUHIKO (JP)
MOTOMURA SUSUMU (JP)
OSUGA FUMIAKI (JP)
Application Number:
PCT/JP2021/016266
Publication Date:
December 30, 2021
Filing Date:
April 22, 2021
Export Citation:
Assignee:
NAT INST MATERIALS SCIENCE (JP)
TAKENAKA CORP (JP)
TAKENAKA CORP (JP)
International Classes:
C22C38/00; B23K35/30; C22C38/58; E04H9/02
Foreign References:
| JP2015150586A | 2015-08-24 | |||
| JP2004218060A | 2004-08-05 | |||
| JP2009155719A | 2009-07-16 | |||
| JP2010090472A | 2010-04-22 | |||
| JP2000501778A | 2000-02-15 | |||
| JP2014129567A | 2014-07-10 | |||
| JP2015150586A | 2015-08-24 |
Other References:
T. SAWAGUCHI ET AL.: "Designing Fe-Mn-Si alloys with improved low-cycle fatigue lives", SCRIPTA MATER, vol. 99, no. 0, 2015, pages 49 - 52
D. T. PIERCEJ.A. JIMENEZJ. BENTLEYD. RAABEC. OSKAYJ.E. WITTIG: "The influence of manganese content on the stacking fault and austenite/epsilon-martensite interfacial energies in Fe-Mn-(Al-Si) steels investigated by experiment and theory", ACTA MATER, vol. 68, no. 15, 2014, pages 238 - 253
S. CURTZEV.T. KUOKKALAA. OIKARIJ. TALONENH. HANNINEN: "Thermodynamic modeling of the stacking fault energy of austenitic steels", ACTA MATER, vol. 59, no. 3, 2011, pages 1068 - 1076
S. ALLAINJ.P. CHATEAUO. BOUAZIZS. MIGOTN. GUELTON: "Correlations between the calculated stacking fault energy and the plasticity mechanisms in Fe-Mn-C alloys", MATERI SCI ENG A, vol. 387, 2004, pages 158 - 162, XP004664167, DOI: 10.1016/j.msea.2004.01.059
O. GRASSELG. FROMMEYER: "Effect of martensitic phase transformation and deformation twinning on mechanical properties of Fe-Mn-Si-Al steels", MATER SCI TECHNOL, vol. 14, no. 12, 1998, pages 1213 - 1217, XP009116713
A. DUMAYJ.P. CHATEAUS. ALLAINS. MIGOTO. BOUAZIZ: "Influence of addition elements on the stacking-fault energy and mechanical properties of an austenitic Fe-Mn-C steel", MATER SCI ENG A, vol. 483-84, 2008, pages 184 - 187
J. NAKANOP.J. JACQUES: "Effects of the thermodynamic parameters of the hcp phase on the stacking fault energy calculations in the Fe-Mn and Fe-Mn-C systems", CALPHAD, vol. 34, no. 2, 2010, pages 167 - 175, XP027057294
J. LACAZEB. SUNDMAN: "An assessment of the Fe-C-Si system", MTA, vol. 22, no. 10, 1991, pages 2211 - 2223
S. COTESA.F. GUILLERMETM. SADE: "Phase stability and fcc/hcp martensitic transformation in Fe-Mn-Si alloys: Part II. Thermodynamic modelling of the driving forces and the M-s and A(s) temperatures", J ALLOY COMPD, vol. 280, no. 1-2, 1998, pages 168 - 177, XP004182276, DOI: 10.1016/S0925-8388(98)00660-4
A. FORSBERGJ. AGREN: "Thermodynamic evaluation of the Fe-Mn-Si system and the γ/ε martensitic transformation", J PHASE EQUIL, vol. 14, no. 3, 1993, pages 354 - 363
I.A. YAKUBTSOVA. ARIAPOURD.D. PEROVIC: "Effect of nitrogen on stacking fault energy of f.c.c. iron-based alloys", ACTA MATER, vol. 47, no. 4, 1999, pages 1271 - 1279, XP027395730
J.-O. ANDERSSONB. SUNDMAN: "Thermodynamic properties of the Cr-Fe system", CALPHAD, vol. 11, no. 1, 1987, pages 83 - 92
K. FRISK: "A thermodynamic evaluation of the Cr-Fe-N system", MTA, vol. 21, no. 9, 1990, pages 2477 - 2488
W.S. YANGC.M. WAN: "The Influence of Aluminum Content to the Stacking-Fault Energy in Fe-Mn-Al-C Alloy System", J MATER SCI, vol. 25, no. 3, 1990, pages 1821 - 1823, XP055720614
L. LIT.Y. HSU: "Gibbs free energy evaluation of the fcc(gamma) and hcp(epsilon) phases in Fe-Mn-Si alloys", CALPHAD, vol. 21, no. 3, 1997, pages 443 - 448
D. T. PIERCEJ.A. JIMENEZJ. BENTLEYD. RAABEC. OSKAYJ.E. WITTIG: "The influence of manganese content on the stacking fault and austenite/epsilon-martensite interfacial energies in Fe-Mn-(Al-Si) steels investigated by experiment and theory", ACTA MATER, vol. 68, no. 15, 2014, pages 238 - 253
S. CURTZEV.T. KUOKKALAA. OIKARIJ. TALONENH. HANNINEN: "Thermodynamic modeling of the stacking fault energy of austenitic steels", ACTA MATER, vol. 59, no. 3, 2011, pages 1068 - 1076
S. ALLAINJ.P. CHATEAUO. BOUAZIZS. MIGOTN. GUELTON: "Correlations between the calculated stacking fault energy and the plasticity mechanisms in Fe-Mn-C alloys", MATERI SCI ENG A, vol. 387, 2004, pages 158 - 162, XP004664167, DOI: 10.1016/j.msea.2004.01.059
O. GRASSELG. FROMMEYER: "Effect of martensitic phase transformation and deformation twinning on mechanical properties of Fe-Mn-Si-Al steels", MATER SCI TECHNOL, vol. 14, no. 12, 1998, pages 1213 - 1217, XP009116713
A. DUMAYJ.P. CHATEAUS. ALLAINS. MIGOTO. BOUAZIZ: "Influence of addition elements on the stacking-fault energy and mechanical properties of an austenitic Fe-Mn-C steel", MATER SCI ENG A, vol. 483-84, 2008, pages 184 - 187
J. NAKANOP.J. JACQUES: "Effects of the thermodynamic parameters of the hcp phase on the stacking fault energy calculations in the Fe-Mn and Fe-Mn-C systems", CALPHAD, vol. 34, no. 2, 2010, pages 167 - 175, XP027057294
J. LACAZEB. SUNDMAN: "An assessment of the Fe-C-Si system", MTA, vol. 22, no. 10, 1991, pages 2211 - 2223
S. COTESA.F. GUILLERMETM. SADE: "Phase stability and fcc/hcp martensitic transformation in Fe-Mn-Si alloys: Part II. Thermodynamic modelling of the driving forces and the M-s and A(s) temperatures", J ALLOY COMPD, vol. 280, no. 1-2, 1998, pages 168 - 177, XP004182276, DOI: 10.1016/S0925-8388(98)00660-4
A. FORSBERGJ. AGREN: "Thermodynamic evaluation of the Fe-Mn-Si system and the γ/ε martensitic transformation", J PHASE EQUIL, vol. 14, no. 3, 1993, pages 354 - 363
I.A. YAKUBTSOVA. ARIAPOURD.D. PEROVIC: "Effect of nitrogen on stacking fault energy of f.c.c. iron-based alloys", ACTA MATER, vol. 47, no. 4, 1999, pages 1271 - 1279, XP027395730
J.-O. ANDERSSONB. SUNDMAN: "Thermodynamic properties of the Cr-Fe system", CALPHAD, vol. 11, no. 1, 1987, pages 83 - 92
K. FRISK: "A thermodynamic evaluation of the Cr-Fe-N system", MTA, vol. 21, no. 9, 1990, pages 2477 - 2488
W.S. YANGC.M. WAN: "The Influence of Aluminum Content to the Stacking-Fault Energy in Fe-Mn-Al-C Alloy System", J MATER SCI, vol. 25, no. 3, 1990, pages 1821 - 1823, XP055720614
L. LIT.Y. HSU: "Gibbs free energy evaluation of the fcc(gamma) and hcp(epsilon) phases in Fe-Mn-Si alloys", CALPHAD, vol. 21, no. 3, 1997, pages 443 - 448
Attorney, Agent or Firm:
TSUZUKI Noriaki (JP)
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