Effect of growth rate on microstructure and tensile properties of Ti-45Al-2Cr-2Nb prepared by electromagnetic cold crucible directional solidification

Hongsheng Ding; Yongzhe Wang; Ruirun Chen; Jingjie Guo; Hengzhi Fu

doi:10.1016/j.matdes.2015.07.122

Effect of growth rate on microstructure and tensile properties of Ti-45Al-2Cr-2Nb prepared by electromagnetic cold crucible directional solidification

Hongsheng Ding^*
, Yongzhe Wang
, Ruirun Chen
, Jingjie Guo
, Hengzhi Fu

^*Corresponding author for this work

Harbin Institute of Technology

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

42 Scopus citations

Abstract

Ti-45Al-2Cr-2Nb alloy was directionally solidified at different growth rates varying from 0.2 to 1.2mm/min by applying an electromagnetic cold crucible directional solidification technique. It was determined that well-aligned α₂ (Ti₃Al)/γ(TiAl) lamellar structures, B₂ phase and blocky γ phase were generated in columnar grains. The interlamellar spacing (λ) decreases with the increasing growth rate (V) according to the relationship λ∝V^-0.48, but the volume fraction of B₂ is increased as growth rate is increasing. Results of uniaxial tensile tests show that the B₂ phase and the blocky γ phase have significant influence on tensile failure when they are presented in the matrix of α₂/γ lamellar structures, because they are usually employed to act as cracking sources during the tension process.

Original language	English
Pages (from-to)	670-678
Number of pages	9
Journal	Materials and Design
Volume	86
DOIs	https://doi.org/10.1016/j.matdes.2015.07.122
State	Published - 5 Dec 2015
Externally published	Yes

Keywords

Directional solidification
Microstructure
Tensile properties
TiAl base alloys

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10.1016/j.matdes.2015.07.122

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@article{97213baef8ed43728057056d286a0282,

title = "Effect of growth rate on microstructure and tensile properties of Ti-45Al-2Cr-2Nb prepared by electromagnetic cold crucible directional solidification",

abstract = "Ti-45Al-2Cr-2Nb alloy was directionally solidified at different growth rates varying from 0.2 to 1.2mm/min by applying an electromagnetic cold crucible directional solidification technique. It was determined that well-aligned α2 (Ti3Al)/γ(TiAl) lamellar structures, B2 phase and blocky γ phase were generated in columnar grains. The interlamellar spacing (λ) decreases with the increasing growth rate (V) according to the relationship λ∝V-0.48, but the volume fraction of B2 is increased as growth rate is increasing. Results of uniaxial tensile tests show that the B2 phase and the blocky γ phase have significant influence on tensile failure when they are presented in the matrix of α2/γ lamellar structures, because they are usually employed to act as cracking sources during the tension process.",

keywords = "Directional solidification, Microstructure, Tensile properties, TiAl base alloys",

author = "Hongsheng Ding and Yongzhe Wang and Ruirun Chen and Jingjie Guo and Hengzhi Fu",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

year = "2015",

month = dec,

day = "5",

doi = "10.1016/j.matdes.2015.07.122",

language = "英语",

volume = "86",

pages = "670--678",

journal = "Materials and Design",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Effect of growth rate on microstructure and tensile properties of Ti-45Al-2Cr-2Nb prepared by electromagnetic cold crucible directional solidification

AU - Ding, Hongsheng

AU - Wang, Yongzhe

AU - Chen, Ruirun

AU - Guo, Jingjie

AU - Fu, Hengzhi

PY - 2015/12/5

Y1 - 2015/12/5

N2 - Ti-45Al-2Cr-2Nb alloy was directionally solidified at different growth rates varying from 0.2 to 1.2mm/min by applying an electromagnetic cold crucible directional solidification technique. It was determined that well-aligned α2 (Ti3Al)/γ(TiAl) lamellar structures, B2 phase and blocky γ phase were generated in columnar grains. The interlamellar spacing (λ) decreases with the increasing growth rate (V) according to the relationship λ∝V-0.48, but the volume fraction of B2 is increased as growth rate is increasing. Results of uniaxial tensile tests show that the B2 phase and the blocky γ phase have significant influence on tensile failure when they are presented in the matrix of α2/γ lamellar structures, because they are usually employed to act as cracking sources during the tension process.

AB - Ti-45Al-2Cr-2Nb alloy was directionally solidified at different growth rates varying from 0.2 to 1.2mm/min by applying an electromagnetic cold crucible directional solidification technique. It was determined that well-aligned α2 (Ti3Al)/γ(TiAl) lamellar structures, B2 phase and blocky γ phase were generated in columnar grains. The interlamellar spacing (λ) decreases with the increasing growth rate (V) according to the relationship λ∝V-0.48, but the volume fraction of B2 is increased as growth rate is increasing. Results of uniaxial tensile tests show that the B2 phase and the blocky γ phase have significant influence on tensile failure when they are presented in the matrix of α2/γ lamellar structures, because they are usually employed to act as cracking sources during the tension process.

KW - Directional solidification

KW - Microstructure

KW - Tensile properties

KW - TiAl base alloys

UR - https://www.scopus.com/pages/publications/84942242656

U2 - 10.1016/j.matdes.2015.07.122

DO - 10.1016/j.matdes.2015.07.122

M3 - 文章

AN - SCOPUS:84942242656

SN - 0264-1275

VL - 86

SP - 670

EP - 678

JO - Materials and Design

JF - Materials and Design

ER -

Effect of growth rate on microstructure and tensile properties of Ti-45Al-2Cr-2Nb prepared by electromagnetic cold crucible directional solidification

Abstract

Keywords

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