Hydride or martensite? Identification of a new phase in cold-rolled hexagonal close-packed Ti

Zongde Kou; Lixia Yang; Yanqing Yang; Xian Luo; Bin Huang

doi:10.1016/j.matchar.2020.110294

Hydride or martensite? Identification of a new phase in cold-rolled hexagonal close-packed Ti

Zongde Kou, Lixia Yang, Yanqing Yang, Xian Luo, Bin Huang

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Two types of lamellar γ-phases are observed in cold-rolled pure α-Ti: the P-type adopting [0001]_α//[001]_γ and (101¯0)_α//(110)_γ, and the B-type adopting [21¯1¯0]_α//[101]_γ and (0001)_α//(1¯1¯1)_γ. By using high-resolution transmission electron microscopy, selected area electron diffraction and stereographic projection, the γ-phase is identified to have a face-centered tetragonal (fct) structure. In situ heating experiment further confirms the γ-phase to be hydride (TiH) precipitate in α-Ti. This work provides convincing evidences that the so-called stress-induced face-centered cubic (fcc) martensite in deformed α-Ti reported previously could be mistakenly identified. Available approaches to distinguish the fcc-Ti martensite from the fct-hydride are also discussed.

Original language	English
Article number	110294
Journal	Materials Characterization
Volume	163
DOIs	https://doi.org/10.1016/j.matchar.2020.110294
State	Published - May 2020

Keywords

Crystallography
Face-centered cubic titanium
In situ TEM
Orientation relationship
Titanium hydride

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@article{d2df078a5a864c24b97266f27a1ea6ed,

title = "Hydride or martensite? Identification of a new phase in cold-rolled hexagonal close-packed Ti",

abstract = "Two types of lamellar γ-phases are observed in cold-rolled pure α-Ti: the P-type adopting [0001]α//[001]γ and (101¯0)α//(110)γ, and the B-type adopting [21¯1¯0]α//[101]γ and (0001)α//(1¯1¯1)γ. By using high-resolution transmission electron microscopy, selected area electron diffraction and stereographic projection, the γ-phase is identified to have a face-centered tetragonal (fct) structure. In situ heating experiment further confirms the γ-phase to be hydride (TiH) precipitate in α-Ti. This work provides convincing evidences that the so-called stress-induced face-centered cubic (fcc) martensite in deformed α-Ti reported previously could be mistakenly identified. Available approaches to distinguish the fcc-Ti martensite from the fct-hydride are also discussed.",

keywords = "Crystallography, Face-centered cubic titanium, In situ TEM, Orientation relationship, Titanium hydride",

author = "Zongde Kou and Lixia Yang and Yanqing Yang and Xian Luo and Bin Huang",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Inc.",

year = "2020",

month = may,

doi = "10.1016/j.matchar.2020.110294",

language = "英语",

volume = "163",

journal = "Materials Characterization",

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T1 - Hydride or martensite? Identification of a new phase in cold-rolled hexagonal close-packed Ti

AU - Kou, Zongde

AU - Yang, Lixia

AU - Yang, Yanqing

AU - Luo, Xian

AU - Huang, Bin

PY - 2020/5

Y1 - 2020/5

N2 - Two types of lamellar γ-phases are observed in cold-rolled pure α-Ti: the P-type adopting [0001]α//[001]γ and (101¯0)α//(110)γ, and the B-type adopting [21¯1¯0]α//[101]γ and (0001)α//(1¯1¯1)γ. By using high-resolution transmission electron microscopy, selected area electron diffraction and stereographic projection, the γ-phase is identified to have a face-centered tetragonal (fct) structure. In situ heating experiment further confirms the γ-phase to be hydride (TiH) precipitate in α-Ti. This work provides convincing evidences that the so-called stress-induced face-centered cubic (fcc) martensite in deformed α-Ti reported previously could be mistakenly identified. Available approaches to distinguish the fcc-Ti martensite from the fct-hydride are also discussed.

AB - Two types of lamellar γ-phases are observed in cold-rolled pure α-Ti: the P-type adopting [0001]α//[001]γ and (101¯0)α//(110)γ, and the B-type adopting [21¯1¯0]α//[101]γ and (0001)α//(1¯1¯1)γ. By using high-resolution transmission electron microscopy, selected area electron diffraction and stereographic projection, the γ-phase is identified to have a face-centered tetragonal (fct) structure. In situ heating experiment further confirms the γ-phase to be hydride (TiH) precipitate in α-Ti. This work provides convincing evidences that the so-called stress-induced face-centered cubic (fcc) martensite in deformed α-Ti reported previously could be mistakenly identified. Available approaches to distinguish the fcc-Ti martensite from the fct-hydride are also discussed.

KW - Crystallography

KW - Face-centered cubic titanium

KW - In situ TEM

KW - Orientation relationship

KW - Titanium hydride

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DO - 10.1016/j.matchar.2020.110294

M3 - 文章

AN - SCOPUS:85083002016

SN - 1044-5803

VL - 163

JO - Materials Characterization

JF - Materials Characterization

M1 - 110294

ER -

Hydride or martensite? Identification of a new phase in cold-rolled hexagonal close-packed Ti

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Keywords

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