다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

비만아 부모의 돌봄 경험: q 방법론

Review on soft magnetic metal and inorganic oxide nanocomposites for power applications

In this work, Al0.3CoCrFeNiSix (x = 0, 0.2, 0.5, 0.8, 1.0 in molar ratio) high-entropy alloys (HEAs) were designed by introducing a non-metallic element Si. The microstructural evolution and its effect on the mechanical properties were discussed. The results suggested that the addition of Si promoted the transition from face-centered cubic (FCC) to body-centered cubic (BCC)/ordered BCC (B2) phases, in which the spherical Cr-rich BCC nanoparticles were coherently dispersed in the Al, Ni-rich B2 matrix. The mechanical properties were improved by adding an appropriate amount of Si. When x increased from 0 to 0.2, the tensile yield strength and ultimate tensile strength increased by 63% and 60%, respectively, while the elongation remained at 56%. The Vickers hardness enhanced from 143 HV (x = 0) to 826 HV (x = 1.0) with increasing Si content, and the specific wear rate reduced by two orders of magnitude accordingly. The strengthening mechanisms were evaluated for this series of HEAs based on the correlation between microstructure and mechanical properties.

Microstructural evolution and mechanical properties of Al0.3CoCrFeNiSix high-entropy alloys containing coherent nanometer-scaled precipitates

https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1243&context=ameslab_manuscripts

Xi Chen

Papers

Review of Fe-6.5 wt%Si high silicon steel—A promising soft magnetic material for sub-kHz application