|
|||||
|
|
On the elemental effect of AlCoCrCuFeNi high-entropy alloy system |
|
| Authors: | Chung-Chin Tung Tao-tsung Shun Yuan-Sheng Huang Hung-Cheng Chen |
| Affiliation: | a Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 300, Taiwan b Department of Materials Science and Engineering, Feng-Chia University, Taichung 40724, Taiwan c Materials Science Center, National Tsing Hua University, Hsinchu 300, Taiwan d Department of Mechanical and electronic engineering, Shaoguan University, Shaoguan City, Guangdong 512005, China e Materials Research Laboratories, Industrial Technology Research Institute, Chutung 310, Taiwan |
| Abstract: | The AlCoCrCuFeNi high-entropy alloy system was synthesized using a well-developed arc melting and casting method. Their elemental effect on microstructures and hardness was investigated with X-ray diffraction, scanning electron microscopy and Vickers hardness testing. The alloys exhibit quite simple FCC and BCC solid solution phases. Co, Cu and Ni elements enhance the formation of the FCC phase while Al and Cr enhance that of the BCC phase in the alloy system. BCC phases form a spinodal structure during cooling. Copper tends to segregate at the interdendrite region and forms a Cu-rich FCC phase. Low copper content renders the interdendrite as a thin film and the as-cast structure like recrystallized grain structure. The formation of BCC phases significantly increases the hardness level of the alloy system. The strengthening mechanism is discussed. |
| Keywords: | High-entropy alloy Elemental effect Microstructure Hardness |
| 本文献已被 ScienceDirect 等数据库收录！ | |