Effects of minor B, Y and cooling rate on the micro-structure refinement of Ti-47Al-2Cr-2Nb alloy

Jianji Wang; Lili Yang; Lijing Zheng; Jie Yan; Zhixia Xiao; Guoqiang Li; Hu Zhang

doi:10.3870/tzzz.2011.03.022

Effects of minor B, Y and cooling rate on the micro-structure refinement of Ti-47Al-2Cr-2Nb alloy

Jianji Wang^*
, Lili Yang
, Lijing Zheng
, Jie Yan
, Zhixia Xiao
, Guoqiang Li
, Hu Zhang

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University
Business and Managing Office of China Perfect Machinery Industry Co., Ltd.

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

2 Scopus citations

Abstract

Effects of minor B and Y as well as cooling rate on compound refinement of microstructure of Ti47Al-2Cr-2Nb alloy were investigated. The results show that in the condition of smelting with the watercooled copper crucible vacuum induction skull furnace and investment casting with Y₂O₃ shell mold, grain size of Ti-47Al-2Cr-2Nb castings is greatly refined with B addition, where coarse columnar grain is converted into fine equaixed one, however, refining effects on lamellar spacing are absent. B and Y compound refinement can not only further effectively refine grain size, but also significantly refine the lamellar spacing. Macro-structure of Ti-47Al-2Cr-2Nb-0. 8B-0. 3Y alloy castings exhibits equiaxed grain with different thickness from 2 mm to 20 mm, meanwhile, with increasing in thickness of the castings, equiaxed grain size is gradually coarsened. It is beneficial for obtaining fine lamellar structure with proper decrease of pre-heating temperature of mold shell.

Original language	English
Pages (from-to)	260-263
Number of pages	4
Journal	Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys
Volume	31
Issue number	3
DOIs	https://doi.org/10.3870/tzzz.2011.03.022
State	Published - Mar 2011

Keywords

B
Cooling rate
Grain size
TiAl alloy
Y

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title = "Effects of minor B, Y and cooling rate on the micro-structure refinement of Ti-47Al-2Cr-2Nb alloy",

abstract = "Effects of minor B and Y as well as cooling rate on compound refinement of microstructure of Ti47Al-2Cr-2Nb alloy were investigated. The results show that in the condition of smelting with the watercooled copper crucible vacuum induction skull furnace and investment casting with Y2O3 shell mold, grain size of Ti-47Al-2Cr-2Nb castings is greatly refined with B addition, where coarse columnar grain is converted into fine equaixed one, however, refining effects on lamellar spacing are absent. B and Y compound refinement can not only further effectively refine grain size, but also significantly refine the lamellar spacing. Macro-structure of Ti-47Al-2Cr-2Nb-0. 8B-0. 3Y alloy castings exhibits equiaxed grain with different thickness from 2 mm to 20 mm, meanwhile, with increasing in thickness of the castings, equiaxed grain size is gradually coarsened. It is beneficial for obtaining fine lamellar structure with proper decrease of pre-heating temperature of mold shell.",

keywords = "B, Cooling rate, Grain size, TiAl alloy, Y",

author = "Jianji Wang and Lili Yang and Lijing Zheng and Jie Yan and Zhixia Xiao and Guoqiang Li and Hu Zhang",

year = "2011",

month = mar,

doi = "10.3870/tzzz.2011.03.022",

language = "英语",

volume = "31",

pages = "260--263",

journal = "Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys",

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TY - JOUR

T1 - Effects of minor B, Y and cooling rate on the micro-structure refinement of Ti-47Al-2Cr-2Nb alloy

AU - Wang, Jianji

AU - Yang, Lili

AU - Zheng, Lijing

AU - Yan, Jie

AU - Xiao, Zhixia

AU - Li, Guoqiang

AU - Zhang, Hu

PY - 2011/3

Y1 - 2011/3

N2 - Effects of minor B and Y as well as cooling rate on compound refinement of microstructure of Ti47Al-2Cr-2Nb alloy were investigated. The results show that in the condition of smelting with the watercooled copper crucible vacuum induction skull furnace and investment casting with Y2O3 shell mold, grain size of Ti-47Al-2Cr-2Nb castings is greatly refined with B addition, where coarse columnar grain is converted into fine equaixed one, however, refining effects on lamellar spacing are absent. B and Y compound refinement can not only further effectively refine grain size, but also significantly refine the lamellar spacing. Macro-structure of Ti-47Al-2Cr-2Nb-0. 8B-0. 3Y alloy castings exhibits equiaxed grain with different thickness from 2 mm to 20 mm, meanwhile, with increasing in thickness of the castings, equiaxed grain size is gradually coarsened. It is beneficial for obtaining fine lamellar structure with proper decrease of pre-heating temperature of mold shell.

AB - Effects of minor B and Y as well as cooling rate on compound refinement of microstructure of Ti47Al-2Cr-2Nb alloy were investigated. The results show that in the condition of smelting with the watercooled copper crucible vacuum induction skull furnace and investment casting with Y2O3 shell mold, grain size of Ti-47Al-2Cr-2Nb castings is greatly refined with B addition, where coarse columnar grain is converted into fine equaixed one, however, refining effects on lamellar spacing are absent. B and Y compound refinement can not only further effectively refine grain size, but also significantly refine the lamellar spacing. Macro-structure of Ti-47Al-2Cr-2Nb-0. 8B-0. 3Y alloy castings exhibits equiaxed grain with different thickness from 2 mm to 20 mm, meanwhile, with increasing in thickness of the castings, equiaxed grain size is gradually coarsened. It is beneficial for obtaining fine lamellar structure with proper decrease of pre-heating temperature of mold shell.

KW - B

KW - Cooling rate

KW - Grain size

KW - TiAl alloy

KW - Y

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U2 - 10.3870/tzzz.2011.03.022

DO - 10.3870/tzzz.2011.03.022

M3 - 文章

AN - SCOPUS:79955107382

SN - 1001-2249

VL - 31

SP - 260

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JO - Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys

JF - Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys

IS - 3

ER -

Effects of minor B, Y and cooling rate on the micro-structure refinement of Ti-47Al-2Cr-2Nb alloy

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Keywords

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