Investigation of Microstructure of Al-5Ti-0.62C System and Synthesis Mechanism of TiC
Ding, Wanwu1,2; Chen, Taili1,2; Zhao, Xiaoyan1,2; Cheng, Yan1,2; Liu, Xiaoxiong1,2; Gou, Lumin1,2
2020-01-02
Source PublicationMATERIALS
Volume13Issue:2
Abstract

Al-Ti-C master alloys have been widely investigated by various researchers. However, their refining effectiveness is still severely compromised by the preparation process. In this work, the aluminum melt in-situ reaction was carried out to synthesize the Al-5Ti-0.62C, and its refining performance was estimated. The thermodynamics calculation and differential scanning calorimeter experiment were used to investigate the synthesis mechanism of TiC. Quenching experiment was conducted to explore phase and microstructure transformation of the Al-5Ti-0.62C system. The results show that the main phases of Al-5Ti-0.62C master alloys are alpha-Al, Al3Ti, and TiC and it has a positive effect on commercial pure aluminum refining. Commercial pure aluminum is completely refined into the fine equiaxed structure by adding 0.3% Al-5Ti-0.62C master alloy. TiC particles mainly distribute in the grain interior and grain boundaries. The excess Ti came from the dissolution of Al3Ti spreading around TiC and finally forming the Ti-rich zone to promote the nucleation of alpha-Al. The experiments certified that TiC was formed by the reaction between solid C and excess Ti atoms. The main reactions in the Al-5Ti-0.62C system were that solid Al is transferred into liquid Al, and then liquid Al reacted with solid Ti to form the Al3Ti. At last, the release of a lot of heat promotes the formation of TiC which formed by the Ti atoms and solid C.

KeywordAl-5Ti-0 62C master alloy quenching experiment grain refining differential scanning calorimeter
DOI10.3390/ma13020310
Indexed BySCI ; SCIE ; EI
Language英语
Funding ProjectNational Natural Science Foundation of China[51661021][51665033] ; National Natural Science Foundation of Gansu[1606RJZA16][1308RJZA291] ; China Postdoctoral Science Foundation[2019M653896XB] ; Gansu key research and development program[18YF1GA061]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000515499900057
PublisherMDPI
EI Accession Number20200908227516
EI KeywordsAluminum alloys
EI Classification Number537.1 Heat Treatment Processes - 541.1 Aluminum - 541.2 Aluminum Alloys - 542.3 Titanium and Alloys - 641.1 Thermodynamics - 801.4 Physical Chemistry - 804.2 Inorganic Compounds - 944.5 Temperature Measuring Instruments - 944.6 Temperature Measurements
Source libraryCompendex
Classification code537.1 Heat Treatment Processes - 541.1 Aluminum - 541.2 Aluminum Alloys - 542.3 Titanium and Alloys - 641.1 Thermodynamics - 801.4 Physical Chemistry - 804.2 Inorganic Compounds - 944.5 Temperature Measuring Instruments - 944.6 Temperature Measurements
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttps://ir.lut.edu.cn/handle/2XXMBERH/64174
Collection省部共建有色金属先进加工与再利用国家重点实验室
材料科学与工程学院
Corresponding AuthorDing, Wanwu
Affiliation1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China;
2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China
First Author AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials;  Coll Mat Sci & Engn
Corresponding Author AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials;  Coll Mat Sci & Engn
First Signature AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials
Recommended Citation
GB/T 7714
Ding, Wanwu,Chen, Taili,Zhao, Xiaoyan,et al. Investigation of Microstructure of Al-5Ti-0.62C System and Synthesis Mechanism of TiC[J]. MATERIALS,2020,13(2).
APA Ding, Wanwu,Chen, Taili,Zhao, Xiaoyan,Cheng, Yan,Liu, Xiaoxiong,&Gou, Lumin.(2020).Investigation of Microstructure of Al-5Ti-0.62C System and Synthesis Mechanism of TiC.MATERIALS,13(2).
MLA Ding, Wanwu,et al."Investigation of Microstructure of Al-5Ti-0.62C System and Synthesis Mechanism of TiC".MATERIALS 13.2(2020).
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