Comparative Study of Hydrogen Embrittlement of Three Heat-resistant Cr-Mo Steels Subjected to Electrochemical and Gaseous Hydrogen Charging

Hydrogen embrittlement (HE) behaviors of low carbon steel and three heat-resistant Cr-Mo steels having different Cr contents were compared through tensile testing, silver decoration, and blistering observation after electrochemical hydrogen charging and hardness testing after gaseous hydrogen charging. It was observed that higher Cr content caused a longer suppression in charging hydrogen into the steels. However, under hydrogen supersaturation conditions, the higher the strength of the heat-resistant steels, the poorer the HE resistance after electrochemical charging. In contrast, the higher the Cr content, the better the HE resistance under high-temperature gaseous charging conditions.

     

Buffer optimization for bovine Longissimus muscle tissues: Proteome analysis of Korean native cattle using 2-dimensional gel electrophoresis

Food Science and Biotechnology - Because beef contains a high proportion of marbling, we sought to optimize the solubilization of the longissimus muscle proteome using modified lysis and...     

FeWO4Cl as cathode material for lithium rechargeable battery

Lithium has been electrochemically and chemically intercalated into layered FeWO₄Cl. The discharge curve between FeWO₄Cl and Li₂FeWO₄Cl is constituted by three potential plateaux and two domains where the cell voltage decreases rapidly upon the intercalation of lithium ions. A wide bi-phase domain is obtained for x in Li _x FeWO₄Cl ranging between 0.0 and 0.85. The limit of a solid solution extends in the vicinity of the LiFeWO₄Cl composition. The theoretical and practical discharge capacities for Li_1???xFeWO₄Cl are 79.03 mAh/g and 78.45 mAh/g respectively. The structures of FeWO₄Cl and LiFeWO₄Cl were determined: from single crystal analysis and by Rietveld refinement of the powder X-ray diffraction pattern respectively. The modifications of the Fe–O bond lengths emphasize the iron reduction during the discharge process. Moreover, the strong change of Fe–Cl distance suggests a reversible framework modification.