Effects of thermal history on the microstructure evolution of Ti-6Al-4V during solidification

Shouyin Zhang, Jinshan Li, Hongchao Kou, Jieren Yang, Guang Yang, Jun Wang

科研成果: 期刊稿件文章同行评审

16 引用 (Scopus)

摘要

Ti-6Al-4V specimens with different thermal histories were obtained by controlling their solidification and cooling through an automatic temperature-controlled induction melting apparatus. The final microstructure of Ti-6Al-4V was determined by both isothermal holding temperature and time during solidification, especially near the β transus temperature. A unique bimodal microstructure consisting of high aspect ratio α particles and small colonies with fine secondary lamellar α appeared in specimens isothermally held from 950°C to 970°C. Water quenching was conducted after isothermal holding treatment for comparison. X-ray diffraction, transmission electron microscopy, and electron probe microanalysis were used to explore the evolution mechanism of the unique bimodal microstructure. Primary α breakdown occurred during isothermal holding treatment because of Ostwald ripening and boundary splitting mechanisms. The formation of small colonies with fine secondary lamellar α was also discussed.

源语言英语
页(从-至)281-287
页数7
期刊Journal of Materials Processing Technology
227
DOI
出版状态已出版 - 15 1月 2016

指纹

探究 'Effects of thermal history on the microstructure evolution of Ti-6Al-4V during solidification' 的科研主题。它们共同构成独一无二的指纹。

引用此