Solidification characteristics of high Nb-containing γ-TiAl-based alloys with different aluminum contents

Yi Liu; Rui Hu; Hong Chao Kou; Jun Wang; Tie Bang Zhang; Jin Shan Li; Ji Zhang

doi:10.1007/s12598-014-0416-y

Solidification characteristics of high Nb-containing γ-TiAl-based alloys with different aluminum contents

Yi Liu
, Rui Hu
, Hong Chao Kou
, Jun Wang
, Tie Bang Zhang
, Jin Shan Li
, Ji Zhang

School of Materials Sience and Engineering

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

22 Scopus citations

Abstract

The effect of Al content on the microstructure and solidification characteristics of Ti–Al–Nb–V–Cr alloys in as-cast and isothermally treated states was investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) equipped with energy dispersive spectroscope (EDS), and transmission electron microscopy (TEM). The typical solidification characteristics are due to the joint influence of both the crystal temperature range and the solidification path. The wide crystallization temperature range contributes to obtaining coarse dendrites in the as-cast Ti47Al7Nb2.5V1.0Cr (at%) alloy solidifying through the peritectic reaction. The β-solidifying Ti46Al7Nb2.5V1.0Cr (at%) alloy with the narrow crystallization temperature range is attributed to the formation of a homogeneous fine-grained microstructure. However, the crystallization temperature range of Ti48Al7Nb2.5V1.0Cr (at%) alloy is equivalent to that of Ti46Al7Nb2.5V1.0Cr alloy, but it is solidified by peritectic reaction, leading to the formation of finer dendrites.

Original language	English
Pages (from-to)	381-386
Number of pages	6
Journal	Rare Metals
Volume	34
Issue number	6
DOIs	https://doi.org/10.1007/s12598-014-0416-y
State	Published - 28 Jun 2015

Keywords

Al-equivalent
Crystal temperature range
Dendrite morphology
Peritectic reaction
Titanium aluminide

Access to Document

10.1007/s12598-014-0416-y

Cite this

@article{df520e5469b044ce9698b654e4c0096c,

title = "Solidification characteristics of high Nb-containing γ-TiAl-based alloys with different aluminum contents",

abstract = "The effect of Al content on the microstructure and solidification characteristics of Ti–Al–Nb–V–Cr alloys in as-cast and isothermally treated states was investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) equipped with energy dispersive spectroscope (EDS), and transmission electron microscopy (TEM). The typical solidification characteristics are due to the joint influence of both the crystal temperature range and the solidification path. The wide crystallization temperature range contributes to obtaining coarse dendrites in the as-cast Ti47Al7Nb2.5V1.0Cr (at\%) alloy solidifying through the peritectic reaction. The β-solidifying Ti46Al7Nb2.5V1.0Cr (at\%) alloy with the narrow crystallization temperature range is attributed to the formation of a homogeneous fine-grained microstructure. However, the crystallization temperature range of Ti48Al7Nb2.5V1.0Cr (at\%) alloy is equivalent to that of Ti46Al7Nb2.5V1.0Cr alloy, but it is solidified by peritectic reaction, leading to the formation of finer dendrites.",

keywords = "Al-equivalent, Crystal temperature range, Dendrite morphology, Peritectic reaction, Titanium aluminide",

author = "Yi Liu and Rui Hu and Kou, \{Hong Chao\} and Jun Wang and Zhang, \{Tie Bang\} and Li, \{Jin Shan\} and Ji Zhang",

note = "Publisher Copyright: {\textcopyright} 2014, The Nonferrous Metals Society of China and Springer-Verlag Berlin Heidelberg.",

year = "2015",

month = jun,

day = "28",

doi = "10.1007/s12598-014-0416-y",

language = "英语",

volume = "34",

pages = "381--386",

journal = "Rare Metals",

issn = "1001-0521",

publisher = "Springer International Publishing",

number = "6",

}

TY - JOUR

T1 - Solidification characteristics of high Nb-containing γ-TiAl-based alloys with different aluminum contents

AU - Liu, Yi

AU - Hu, Rui

AU - Kou, Hong Chao

AU - Wang, Jun

AU - Zhang, Tie Bang

AU - Li, Jin Shan

AU - Zhang, Ji

PY - 2015/6/28

Y1 - 2015/6/28

N2 - The effect of Al content on the microstructure and solidification characteristics of Ti–Al–Nb–V–Cr alloys in as-cast and isothermally treated states was investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) equipped with energy dispersive spectroscope (EDS), and transmission electron microscopy (TEM). The typical solidification characteristics are due to the joint influence of both the crystal temperature range and the solidification path. The wide crystallization temperature range contributes to obtaining coarse dendrites in the as-cast Ti47Al7Nb2.5V1.0Cr (at%) alloy solidifying through the peritectic reaction. The β-solidifying Ti46Al7Nb2.5V1.0Cr (at%) alloy with the narrow crystallization temperature range is attributed to the formation of a homogeneous fine-grained microstructure. However, the crystallization temperature range of Ti48Al7Nb2.5V1.0Cr (at%) alloy is equivalent to that of Ti46Al7Nb2.5V1.0Cr alloy, but it is solidified by peritectic reaction, leading to the formation of finer dendrites.

AB - The effect of Al content on the microstructure and solidification characteristics of Ti–Al–Nb–V–Cr alloys in as-cast and isothermally treated states was investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) equipped with energy dispersive spectroscope (EDS), and transmission electron microscopy (TEM). The typical solidification characteristics are due to the joint influence of both the crystal temperature range and the solidification path. The wide crystallization temperature range contributes to obtaining coarse dendrites in the as-cast Ti47Al7Nb2.5V1.0Cr (at%) alloy solidifying through the peritectic reaction. The β-solidifying Ti46Al7Nb2.5V1.0Cr (at%) alloy with the narrow crystallization temperature range is attributed to the formation of a homogeneous fine-grained microstructure. However, the crystallization temperature range of Ti48Al7Nb2.5V1.0Cr (at%) alloy is equivalent to that of Ti46Al7Nb2.5V1.0Cr alloy, but it is solidified by peritectic reaction, leading to the formation of finer dendrites.

KW - Al-equivalent

KW - Crystal temperature range

KW - Dendrite morphology

KW - Peritectic reaction

KW - Titanium aluminide

UR - https://www.scopus.com/pages/publications/84930192984

U2 - 10.1007/s12598-014-0416-y

DO - 10.1007/s12598-014-0416-y

M3 - 文章

AN - SCOPUS:84930192984

SN - 1001-0521

VL - 34

SP - 381

EP - 386

JO - Rare Metals

JF - Rare Metals

IS - 6

ER -

Solidification characteristics of high Nb-containing γ-TiAl-based alloys with different aluminum contents

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this