検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

Anomalous strengthening mechanism in HCP Ti

六方晶チタンの特異な強化機構

都留 智仁  ; Chrzan, D. C.*; Rodney, D.*

Tsuru, Tomohito; Chrzan, D. C.*; Rodney, D.*

転位と合金元素の相互作用の特性は合金の電子状態に起因する。我々は第一原理計算を用いてチタンの特異なロッキング機構について検討を行った。転位の安定構造について積層欠陥エネルギーと転位芯構造解析を行った結果、ジルコニウムと異なりチタンでは一次錐面上に最も安定な積層欠陥を有するため、転位が運動方向でない錐面にロッキングされることを明らかにした。また、固溶した酸素は刃状転位とらせん転位でそれぞれ引力と斥力を生じることがわかった。

The properties of the dislocation/solute interaction are rooted in the electronic structure of the alloy. We explored the origin of anomalous locking mechanism in Ti using first-principles calculations. Stable configurations of a screw dislocation were investigated by stacking fault energy on various slip planes and direct calculations of dislocation in pure Ti. Unlike Zr, a screw dislocation is most stable when they dissociate into pyramidal plane. The Peierls stress for this locking configuration to move on prismatic plane is surprisingly about 800 MPa, which means that Ti has a special strengthening mechanism on its own without any solid solution.

Access

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.