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Preparation method of nanocrystalline titanium alloy at low strain
US9039849B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9039849-B2 |
| Application number | US-200913394195-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 30, 2009 |
| Priority date | Sep 7, 2009 |
| Publication date | May 26, 2015 |
| Grant date | May 26, 2015 |
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Abstract
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Provided is a method of preparing a nanocrystalline titanium alloy at low strain to have better strength. The present invention is characterized in that an initial microstructure is induced as martensites having a fine layered structure, and then a nanocrystalline titanium alloy is prepared at low strain by optimizing process variables through observation of the effects of strain, strain rate, and deformation temperature on the changes in the microstructure.
First claim
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The invention claimed is: 1. A method of preparing a nanocrystalline titanium alloy, the method comprising; segmenting a martensite structure haying a layered structure into a fine equiaxed structure having a size range of 200 nm to 400 nm by rolling under conditions that a deformation temperature ranges from 575° C. to 625° C., a strain rate ranges from 0.07 to 0.13 s −1 , and a strain ranges from 0.9 to 1.8, wherein a dynamic spheroidization is generated when the layered structure of the martensite structure is entirely segmented into the fine equiaxed structure. 2. The method of claim 1 , wherein the deformation temperature is 600° C., the strain rate is 0.1 s −1 , and the strain is 1.4. 3. The method of claim 1 , wherein the martensite structure is obtained from an initial microstructure of a Ti-13Nb-13Zr alloy by water quenching the initial microstructure after being maintained at 800° C. for 30 minutes.
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- C22C14/00Primary
Alloys based on titanium · CPC title
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- What does patent US9039849B2 cover?
- Provided is a method of preparing a nanocrystalline titanium alloy at low strain to have better strength. The present invention is characterized in that an initial microstructure is induced as martensites having a fine layered structure, and then a nanocrystalline titanium alloy is prepared at low strain by optimizing process variables through observation of the effects of strain, strain rate, …
- Who is the assignee on this patent?
- Park Chan Hee, Lee Chong Soo, Park Sung Hyuk, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification C22C14/00. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 26 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).