Effects of Ti powder additions in melt-SHS process on the performance of Al-Ti-B grain refiner alloys - Details

Author：

Li, He (Li, He.) | Chai, Li Hua (Chai, Li Hua.) | Xiang, Zhi Lei (Xiang, Zhi Lei.) | Cui, Yong Shuang (Cui, Yong Shuang.) | Chen, Zi Yong (Chen, Zi Yong.) (Scholars：陈子勇)

Indexed by：

EI Scopus

Abstract：

Melt-SHS　(Self-propagating　High-temperature　Synthesis)　was　used　for　the　preparation　of　Al–5Ti–1B　master　alloy.　The　quality　ratio　of　Ti　powder/TiO2in　initial　powder　mixture　was　varied　from　0:1　to　1:0.　The　AES,　XRD　and　SEM　were　applied　to　evaluate　the　microstructure　and　phase　componet.　The　results　showed　that　the　Al-5Ti-1B　master　alloy　could　be　successful　produced　by　the　reaction　of　Al　powder,　TiO2and　H3BO3in　Al　melt,　while　the　reaction　rate　was　slow.　The　microstructure　mainly　presents　the　TiAl3particles　with　long　strip　shape.　A　significant　improvement　was　noted　both　in　reaction　rate　and　in　the　grain　refining　efficiency　when　Ti　powder　was　added　to　the　reactants　and　the　optimized　ratio　of　Ti　powder/TiO2was　2:3.　The　TiAl3particles　were　reduced　and　the　grain　refining　efficiency　turned　bad　when　Ti　powder　was　totally　used　to　supply　Ti.　©　2017　Trans　Tech　Publications,　Switzerland.

Keyword：

Reaction rates Titanium alloys Grain refinement Aluminum alloys Titanium oxides Oxides Efficiency Microstructure Refining

Author Community：

[ 1 ] [Li, He]Beijing University of Technology, No.100, Pingleyuan, Chaoyang District, Beijing; 100124, China
[ 2 ] [Chai, Li Hua]Beijing University of Technology, No.100, Pingleyuan, Chaoyang District, Beijing; 100124, China
[ 3 ] [Xiang, Zhi Lei]Beijing University of Technology, No.100, Pingleyuan, Chaoyang District, Beijing; 100124, China
[ 4 ] [Cui, Yong Shuang]Beijing University of Technology, No.100, Pingleyuan, Chaoyang District, Beijing; 100124, China
[ 5 ] [Chen, Zi Yong]Beijing University of Technology, No.100, Pingleyuan, Chaoyang District, Beijing; 100124, China