REVIEW ARTICLE | Jan. 12, 2022
The Relation of the Tensile & Shear Stress of Schmid & their Efficient Fracture Stress with Twins and Dislocations in TiAl Alloys
Run Xu, Boyong Hur, Sugun Lim, Younwook Kim
Page no 1-5
It is reasonable within the range from 45 ° to 90 °. It shows that it is maximum of the efficient resolved tensile and shear stress at 90°. The twin is the most active around 45 ° roughly the most active range is 22.5 to 67.5°. Therefore we believe that the possibility of twin is relatively high. The effective stress according to s2eff=ss2+tc2-2sstc cos (90°+ϕ) and the adapted effective stress s2eff=ss2+tc2 likely excludes a little deviation with 0~4MPa in Ti2AlNb. The deviation is largest with 4MPa in ϕ of 42.5° in Ti2AlNb. The range rate is 0.5%. According to efficient stress & twins and dislocation happen at λ=45°and 90°.
ORIGINAL RESEARCH ARTICLE | Jan. 21, 2022
Synthesis, Characterization and Antimicrobial Activities of Schiff Base Complexes of Co (II) and Cu (II) Derived from Salicyldehyde and Diphenylamine
Page no 6-10
This paper reports antibacterial and antifungal activities of Schiff base and that’s of its metal (II) complexes (Co, Cu) derived from salicyldehyde and diphenylamine. The Schiff base and its metal (II) complexes were characterized using different analytical techniques like FTIR, melting point, solubility, and molar conductance, The Schiff base and its respective metals complexes were colored. The result from IR analysis revealed bands at 1614cm-1 indicating the formation of azomethine (C=N) confirming the formation of Schiff base. The band at 664cm-1indicate the formation of complex which is assign toV(M-N) supporting coordination of Schiff base to respective metals. The solubility test result showed that both the Schiff base and complexes are soluble in most organic solvent and insoluble in water. Both the schiff base and complexes revealed sharp melting point and decomposition temperature. The molar conductance data of the complexes in Dimethylsulphoxide(DMSO) show low value of 9 and 10 Ohm-1cm2 mol-1) indicating the complexes are non-electrolytes. The entire compound was tested for their antibacterial and antifungal activities. The results indicated that the growth of the tested organism was inhibited by the compounds.