Effects of boron addition on phase transformation of Ti47Al alloy

Lina Fan; Hongchao Kou; Hong Zhong; Tiebang Zhang; Jinshan Li

Effects of boron addition on phase transformation of Ti47Al alloy

Lina Fan
, Hongchao Kou
, Hong Zhong
, Tiebang Zhang
, Jinshan Li

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

2 Scopus citations

Abstract

Samples of Ti47Al and Ti47Al0.5B with different cooling rates from the α single phase region have been investigated in order to understand the influence of boron addition and cooling rate on phase transformation. The results show that the addition of boron can effectively refine the lamellar colony. The massive microstructure nucleates mainly at the grain boundaries of original α grain and a little in the inner of original α grain in Ti47Al alloy. Boron addition could promote the α to γ_m massive transformation during water quenching, this is due to the considerable effect of boron on refinement of the α grain size and also related to boron in solution. During OQ and AC boron could promote the α to lamellar transformation and suppress forming of the α to feathery structure and Widmanstätten structure because of increasing the critical cooling rate to obtain the lamellar microstructure.

Original language	English
Pages (from-to)	115-119
Number of pages	5
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	43
Issue number	1
State	Published - Jan 2014

Keywords

B addition
Massive microstructure
Phase transformation
Titanium aluminides

Cite this

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title = "Effects of boron addition on phase transformation of Ti47Al alloy",

abstract = "Samples of Ti47Al and Ti47Al0.5B with different cooling rates from the α single phase region have been investigated in order to understand the influence of boron addition and cooling rate on phase transformation. The results show that the addition of boron can effectively refine the lamellar colony. The massive microstructure nucleates mainly at the grain boundaries of original α grain and a little in the inner of original α grain in Ti47Al alloy. Boron addition could promote the α to γm massive transformation during water quenching, this is due to the considerable effect of boron on refinement of the α grain size and also related to boron in solution. During OQ and AC boron could promote the α to lamellar transformation and suppress forming of the α to feathery structure and Widmanst{\"a}tten structure because of increasing the critical cooling rate to obtain the lamellar microstructure.",

keywords = "B addition, Massive microstructure, Phase transformation, Titanium aluminides",

author = "Lina Fan and Hongchao Kou and Hong Zhong and Tiebang Zhang and Jinshan Li",

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journal = "Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering",

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TY - JOUR

T1 - Effects of boron addition on phase transformation of Ti47Al alloy

AU - Fan, Lina

AU - Kou, Hongchao

AU - Zhong, Hong

AU - Zhang, Tiebang

AU - Li, Jinshan

PY - 2014/1

Y1 - 2014/1

N2 - Samples of Ti47Al and Ti47Al0.5B with different cooling rates from the α single phase region have been investigated in order to understand the influence of boron addition and cooling rate on phase transformation. The results show that the addition of boron can effectively refine the lamellar colony. The massive microstructure nucleates mainly at the grain boundaries of original α grain and a little in the inner of original α grain in Ti47Al alloy. Boron addition could promote the α to γm massive transformation during water quenching, this is due to the considerable effect of boron on refinement of the α grain size and also related to boron in solution. During OQ and AC boron could promote the α to lamellar transformation and suppress forming of the α to feathery structure and Widmanstätten structure because of increasing the critical cooling rate to obtain the lamellar microstructure.

AB - Samples of Ti47Al and Ti47Al0.5B with different cooling rates from the α single phase region have been investigated in order to understand the influence of boron addition and cooling rate on phase transformation. The results show that the addition of boron can effectively refine the lamellar colony. The massive microstructure nucleates mainly at the grain boundaries of original α grain and a little in the inner of original α grain in Ti47Al alloy. Boron addition could promote the α to γm massive transformation during water quenching, this is due to the considerable effect of boron on refinement of the α grain size and also related to boron in solution. During OQ and AC boron could promote the α to lamellar transformation and suppress forming of the α to feathery structure and Widmanstätten structure because of increasing the critical cooling rate to obtain the lamellar microstructure.

KW - B addition

KW - Massive microstructure

KW - Phase transformation

KW - Titanium aluminides

UR - https://www.scopus.com/pages/publications/84894740454

M3 - 文章

AN - SCOPUS:84894740454

SN - 1002-185X

VL - 43

SP - 115

EP - 119

JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - 1

ER -

Effects of boron addition on phase transformation of Ti47Al alloy

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