Enhanced Corrosion−Resistance of AlTiCrFeMoSi High−Entropy Alloy Coating by Magnetron Sputtering

The amorphous AlTiCrFeMoSi high entropy alloy (HEA) coating with high hardness (11.88 GPa) is successfully deposited on T91 substrate by the magnetron sputtering method. Both T91 steel and as−deposited AlTiCrFeMoSi coating samples are exposed to a static liquid lead−bismuth eutectic (LBE) at 550 °C for up to 2000 h. The coating exhibits excellent corrosion resistance against lead−bismuth eutectic (LBE) compared with the uncoated T91 steel. The results show that the AlTiCrFeMoSi HEA coating has great potential in LBE−cooled fast reactor application

Design of High Entropy Alloys Based on Phase Formation Criteria and Big Data System

The development and phase formation criteria of high entropy alloys (HEAs) were described briefly. A new alloy design form was proposed in view of the big data system of high entropy alloy, and a new high entropy alloy was designed and studied. The result shows that the design form, A(x)B(y)C((100-a-b-x-y))D(a)E(b), is more in line with the requirements of the big data system compared with the previous alloy forms such as A(x)BCDE. The proposed design method can rapidly and visually screen out the expected alloy composition from the big data system of high entropy alloy. The designed high entropy alloy, AlCoCrFeMo0.05Ni2, agrees with the target alloy, and has a great application prospect below 700 degrees C

Crystallization and X-ray crystallographic analysis of m-calpain, a Ca²⁺-dependent protease

The absolute requirement of Ca2+ for proteolytic activity is a feature unique to the calpains, a family of heterodimeric cysteine proteases. Conditions are described which give rise to diffraction-quality crystals of m-calpain in two crystal forms, P1 and P21. Data have been collected from native crystals of m-calpain in both P1 and P21 forms, to 2.6 and 2.15 Å, respectively. Selenomethionine-containing crystals have been grown in both forms, and anomalous data from the P21 selenomethionine enzyme provided the location of 17 of the 19 Se atoms in the protein.</jats:p