Deformation mechanisms in a metastable beta titanium twinning induced plasticity alloy with high yield strength and high strain hardening rate

Research output: Contribution to journalArticlepeer-review

Standard

Deformation mechanisms in a metastable beta titanium twinning induced plasticity alloy with high yield strength and high strain hardening rate. / Gao, Junheng; Huang, Yuhe; Guan, Dikai; Knowles, Alexander J.; Ma, Le; Dye, David; Rainforth, W. Mark.

In: Acta Materialia, Vol. 152, 15.06.2018, p. 301-314.

Research output: Contribution to journalArticlepeer-review

Harvard

APA

Vancouver

Author

Gao, Junheng ; Huang, Yuhe ; Guan, Dikai ; Knowles, Alexander J. ; Ma, Le ; Dye, David ; Rainforth, W. Mark. / Deformation mechanisms in a metastable beta titanium twinning induced plasticity alloy with high yield strength and high strain hardening rate. In: Acta Materialia. 2018 ; Vol. 152. pp. 301-314.

Bibtex

@article{fd5528a8ff2f439fa84c200f93ae6c74,
title = "Deformation mechanisms in a metastable beta titanium twinning induced plasticity alloy with high yield strength and high strain hardening rate",
abstract = "Metastable β titanium alloys with both twinning (TWIP) and martensite transformation (TRIP) usually exhibit a low yield strength of between 200 and 500 MPa, but high strain hardening rate and large uniform elongation. Alloys that exhibit twinning on a single system provide a higher yield strength, but a lower strain hardening rate. Here, for the first time, we report a new alloy (Ti-7Mo-3Cr wt%) with both high yield strength (695 MPa) and high work hardening rate (∼1900 MPa) and a substantial 33.3% uniform elongation. The deformation mechanisms were systematically investigated using EBSD and TEM for samples strained to 1.3%, 5% and 16%. The high yield strength was achieved through initial deformation mechanisms of two twin systems, namely both {332}<113> and {112}<111> twinning. Importantly, the martensite transformation was suppressed at this stage of deformation. The combination of two twin systems, with approximately the same intensity, resulted in a high strain hardening rate (1600 MPa–1900 MPa), much greater compared to alloys that exhibit a single twin system. Moreover, the TRIP effect was observed at strains greater than 5%, which also contributed to the high strain hardening rate large uniform elongation.",
author = "Junheng Gao and Yuhe Huang and Dikai Guan and Knowles, {Alexander J.} and Le Ma and David Dye and Rainforth, {W. Mark}",
year = "2018",
month = jun,
day = "15",
doi = "10.1016/j.actamat.2018.04.035",
language = "English",
volume = "152",
pages = "301--314",
journal = "Acta Materialia",
issn = "1359-6454",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Deformation mechanisms in a metastable beta titanium twinning induced plasticity alloy with high yield strength and high strain hardening rate

AU - Gao, Junheng

AU - Huang, Yuhe

AU - Guan, Dikai

AU - Knowles, Alexander J.

AU - Ma, Le

AU - Dye, David

AU - Rainforth, W. Mark

PY - 2018/6/15

Y1 - 2018/6/15

N2 - Metastable β titanium alloys with both twinning (TWIP) and martensite transformation (TRIP) usually exhibit a low yield strength of between 200 and 500 MPa, but high strain hardening rate and large uniform elongation. Alloys that exhibit twinning on a single system provide a higher yield strength, but a lower strain hardening rate. Here, for the first time, we report a new alloy (Ti-7Mo-3Cr wt%) with both high yield strength (695 MPa) and high work hardening rate (∼1900 MPa) and a substantial 33.3% uniform elongation. The deformation mechanisms were systematically investigated using EBSD and TEM for samples strained to 1.3%, 5% and 16%. The high yield strength was achieved through initial deformation mechanisms of two twin systems, namely both {332}<113> and {112}<111> twinning. Importantly, the martensite transformation was suppressed at this stage of deformation. The combination of two twin systems, with approximately the same intensity, resulted in a high strain hardening rate (1600 MPa–1900 MPa), much greater compared to alloys that exhibit a single twin system. Moreover, the TRIP effect was observed at strains greater than 5%, which also contributed to the high strain hardening rate large uniform elongation.

AB - Metastable β titanium alloys with both twinning (TWIP) and martensite transformation (TRIP) usually exhibit a low yield strength of between 200 and 500 MPa, but high strain hardening rate and large uniform elongation. Alloys that exhibit twinning on a single system provide a higher yield strength, but a lower strain hardening rate. Here, for the first time, we report a new alloy (Ti-7Mo-3Cr wt%) with both high yield strength (695 MPa) and high work hardening rate (∼1900 MPa) and a substantial 33.3% uniform elongation. The deformation mechanisms were systematically investigated using EBSD and TEM for samples strained to 1.3%, 5% and 16%. The high yield strength was achieved through initial deformation mechanisms of two twin systems, namely both {332}<113> and {112}<111> twinning. Importantly, the martensite transformation was suppressed at this stage of deformation. The combination of two twin systems, with approximately the same intensity, resulted in a high strain hardening rate (1600 MPa–1900 MPa), much greater compared to alloys that exhibit a single twin system. Moreover, the TRIP effect was observed at strains greater than 5%, which also contributed to the high strain hardening rate large uniform elongation.

UR - http://www.scopus.com/inward/record.url?scp=85046069705&partnerID=8YFLogxK

U2 - 10.1016/j.actamat.2018.04.035

DO - 10.1016/j.actamat.2018.04.035

M3 - Article

AN - SCOPUS:85046069705

VL - 152

SP - 301

EP - 314

JO - Acta Materialia

JF - Acta Materialia

SN - 1359-6454

ER -