Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


osu1211902429.pdf (1.38 MB)

ETD Abstract Container

Abstract Header

Quantitative Study Of Precipitate Growth In Ti-6al-4v Using The Phase Field Method

Yang, Fan
http://rave.ohiolink.edu/etdc/view?acc_num=osu1211902429

Abstract Details

2008, Master of Science, Ohio State University, Materials Science and Engineering.
Microstrucures play an important role in determining the properties of titanium alloys. This work employs the phase field method to study diffusional phase transformation and the accompanying microstructural evolutions in Ti-6Al-4V. The phase field method used in this work incorporated real thermodynamic and mobility data base and adopts the model proposed by Kim et al. to eliminate the inherent length scale problem in traditional phase field method. It also uses the sparse data structure and algorithm to achieve more efficient computing.Different initial microstructures are used to study how spatial and size distribution of the precipitate phase may influence the kinetics of precipitate growth. Compared to the case with particles of identical size, a normal size distribution of the alpha precipitates has little influence on the kinetics of precipitate growth. However, a uniform spatial distribution of the precipitates will slightly speed up the kinetics, compared to a system with a spatially random distributed precipitates. Grain boundary diffusion becomes dominant below to . It can speed up the kinetics much more and even alters the shapes of the grain boundary alpha phase during evolution. The grain boundary alpha layers developed by grain boundary diffusion may serve as nucleation sites for the secondary plate-like alpha precipitates. In this present study, a model is developed, which can capture the evolution of grain boundary alpha phase and its kinetics.
Yunzhi Wang (Advisor)
Suliman Dregia (Committee Member)
53 p.
Materials Science
phase field; precipitate growth kinetics; grain boundary diffusion

Recommended Citations

Citations

  • Yang, F. (2008). Quantitative Study Of Precipitate Growth In Ti-6al-4v Using The Phase Field Method [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1211902429

    APA Style (7th edition)

  • Yang, Fan. Quantitative Study Of Precipitate Growth In Ti-6al-4v Using The Phase Field Method. 2008. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1211902429.

    MLA Style (8th edition)

  • Yang, Fan. "Quantitative Study Of Precipitate Growth In Ti-6al-4v Using The Phase Field Method." Master's thesis, Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1211902429

    Chicago Manual of Style (17th edition)

osu1211902429
833
© 2008, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.