7/26 Speech

• 
• 

會員評等：  / 0

詳細內容

上層分類：News

分類：Speeches

建立於 2018-07-18, 週三 14:23

最近更新於 2018-10-11, 週四 09:28

發佈於：2018-07-18, 週三 14:24

點擊數：4764

Speaker: Professor Peter K. Liaw

Topic: Design of Advanced Light-weight High-entropy Alloys (HEAs)

 

Speaker：Professor Peter K. Liaw 

Organization：Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996, USA 

Topic：Design of Advanced Light-weight High-entropy Alloys (HEAs) 

Date：AM 10:00 , 2018.7.26 

Location：Room 228, College of Engineering 

Education： 

Ph.D., Department of Materials Science and Engineering, Northwestern University, U.S.A. 

B.S., Department of Physics, National Tsing Hua University, Taiwan 

Abstract：

Traditional high-temperature materials, such as Ni-based or Co-based superalloys, are heavy and expensive, despite of their outstanding high-temperature performance. However, recent emergence of high-entropy alloys (HEAs) offers new avenues for exploring novel low-cost, great strength-to-weight ratio elevated-temperature structural materials. In the present study, advanced light-weight HEAs (LWHEAs) are designed based on the Al-Cr-Fe-Mn-Ti system, through the integrated high-throughput thermodynamic calculations, first-principles calculations, and experimental methods. These LWEHAs are composed of coherent nano-sized L21 and BCC two-phase structures. Due to the remarkable precipitation strengthening and solid-solution strengthening, the newly-designed light-weight HEAs possess attractive high-temperature strengths, which is comparable with those commercial superalloys.