Grain refinement of Ti-15Mo-3Al-2.7Nb-0.2Si alloy with the rotation of TiB whiskers by powder metallurgy and canned hot extrusion

Jiabin Hou; Lin Gao; Guorong Cui; Wenzhen Chen; Wencong Zhang; Wenguang Tian

doi:10.3390/met10010126

Grain refinement of Ti-15Mo-3Al-2.7Nb-0.2Si alloy with the rotation of TiB whiskers by powder metallurgy and canned hot extrusion

Jiabin Hou
, Lin Gao
, Guorong Cui^*
, Wenzhen Chen
, Wencong Zhang
, Wenguang Tian

^*Corresponding author for this work

Harbin Institute of Technology
Shandong Jiaotong University
Oriental Bluesky Titanium Technology Co., LTD.

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

8 Scopus citations

Abstract

In situ synthesized TiB whiskers (TiBw) reinforced Ti-15Mo-3Al-2.7Nb-0.2Si alloys were successfully manufactured by pre-sintering and canned hot extrusion via adding TiB₂ powders. During pre-sintering, most TiB2 were reacted with Ti atoms to produce TiB. During extrusion, the continuous dynamic recrystallization (CDRX) of β grains was promoted with the rotation of TiBw, and CDRXed grains were strongly inhibited by TiBw with hindering dislocation motion. Eventually, the grain sizes of composites decreased obviously. Furthermore, the stress transmitted from the matrix to TiBw for strengthening in a tensile test, besides grain refinement. Meanwhile, the fractured TiBw and microcracks around them contributed to fracturing.

Original language	English
Article number	126
Journal	Metals
Volume	10
Issue number	1
DOIs	https://doi.org/10.3390/met10010126
State	Published - Jan 2020
Externally published	Yes

Keywords

Dynamic recrystallization
Grain refinement
Strengthening
TiB whiskers

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10.3390/met10010126

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title = "Grain refinement of Ti-15Mo-3Al-2.7Nb-0.2Si alloy with the rotation of TiB whiskers by powder metallurgy and canned hot extrusion",

abstract = "In situ synthesized TiB whiskers (TiBw) reinforced Ti-15Mo-3Al-2.7Nb-0.2Si alloys were successfully manufactured by pre-sintering and canned hot extrusion via adding TiB2 powders. During pre-sintering, most TiB2 were reacted with Ti atoms to produce TiB. During extrusion, the continuous dynamic recrystallization (CDRX) of β grains was promoted with the rotation of TiBw, and CDRXed grains were strongly inhibited by TiBw with hindering dislocation motion. Eventually, the grain sizes of composites decreased obviously. Furthermore, the stress transmitted from the matrix to TiBw for strengthening in a tensile test, besides grain refinement. Meanwhile, the fractured TiBw and microcracks around them contributed to fracturing.",

keywords = "Dynamic recrystallization, Grain refinement, Strengthening, TiB whiskers",

author = "Jiabin Hou and Lin Gao and Guorong Cui and Wenzhen Chen and Wencong Zhang and Wenguang Tian",

note = "Publisher Copyright: {\textcopyright} 2020 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2020",

month = jan,

doi = "10.3390/met10010126",

language = "英语",

volume = "10",

journal = "Metals",

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T1 - Grain refinement of Ti-15Mo-3Al-2.7Nb-0.2Si alloy with the rotation of TiB whiskers by powder metallurgy and canned hot extrusion

AU - Hou, Jiabin

AU - Gao, Lin

AU - Cui, Guorong

AU - Chen, Wenzhen

AU - Zhang, Wencong

AU - Tian, Wenguang

PY - 2020/1

Y1 - 2020/1

N2 - In situ synthesized TiB whiskers (TiBw) reinforced Ti-15Mo-3Al-2.7Nb-0.2Si alloys were successfully manufactured by pre-sintering and canned hot extrusion via adding TiB2 powders. During pre-sintering, most TiB2 were reacted with Ti atoms to produce TiB. During extrusion, the continuous dynamic recrystallization (CDRX) of β grains was promoted with the rotation of TiBw, and CDRXed grains were strongly inhibited by TiBw with hindering dislocation motion. Eventually, the grain sizes of composites decreased obviously. Furthermore, the stress transmitted from the matrix to TiBw for strengthening in a tensile test, besides grain refinement. Meanwhile, the fractured TiBw and microcracks around them contributed to fracturing.

AB - In situ synthesized TiB whiskers (TiBw) reinforced Ti-15Mo-3Al-2.7Nb-0.2Si alloys were successfully manufactured by pre-sintering and canned hot extrusion via adding TiB2 powders. During pre-sintering, most TiB2 were reacted with Ti atoms to produce TiB. During extrusion, the continuous dynamic recrystallization (CDRX) of β grains was promoted with the rotation of TiBw, and CDRXed grains were strongly inhibited by TiBw with hindering dislocation motion. Eventually, the grain sizes of composites decreased obviously. Furthermore, the stress transmitted from the matrix to TiBw for strengthening in a tensile test, besides grain refinement. Meanwhile, the fractured TiBw and microcracks around them contributed to fracturing.

KW - Dynamic recrystallization

KW - Grain refinement

KW - Strengthening

KW - TiB whiskers

UR - https://www.scopus.com/pages/publications/85078464187

U2 - 10.3390/met10010126

DO - 10.3390/met10010126

M3 - 文章

AN - SCOPUS:85078464187

SN - 2075-4701

VL - 10

JO - Metals

JF - Metals

IS - 1

M1 - 126

ER -

Grain refinement of Ti-15Mo-3Al-2.7Nb-0.2Si alloy with the rotation of TiB whiskers by powder metallurgy and canned hot extrusion

Abstract

Keywords

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