Large gains in strength and ductility are of little significance if the material’s anisotropy is high. Therefore, improving mechanical properties reducing Al alloys obtained by additive manufacturing a topic growing interest. This manuscript examines effect distinct heat treatments on mechanical, anisotropic, microstructural behavior hypoeutectic, almost eutectic, AlSi11Cu alloy laser powder be...

Bu çalışmada, Yld2000 akma fonksiyonunun katsayılarının belirlenmesinde nümerik optimizasyon tekniklerinden ardışık kuadratik programlama ve aktif-set metotlarının performansları değerlendirilmiştir. Çalışmada iki alüminyum alaşımı (AA6111-T4, AA6181-T4) bir yüksek mukavemetli sac malzeme (DP980) seçilmiştir. Yöntemler, hata fonksiyonunu yakınsama hızlarına minimizasyon sırasında inceledikleri ...

The yield criterion, or so-called function, plays an important role in the study of plastic working a sheet because it governs deformation properties during plastic-forming process. In this paper, we propose novel anisotropic function useful for describing behavior various sheets. proposed includes version second stress invariant J2 and third J3. can explain sheets by introducing parameters α β...

Fay has described in 12,3] a complete T-unilication for equational theories T which possess a complete set of reductions as defined by Knuth & Bendix [12]. This algorithm relies essentially on using the narrowing process defined by Lankford I13]. In this paper, we first study the relations between narrowing and unification and we give a new version of Fay's algorithm. We then show bow to elimin...

Donald J . Boyd, Hamil ton Lankford, Susanna Loeb, and James H. Wyckoff School districts are confronting difficult choices in the aftermath of the financial crisis. In prior recessions, districts often muddled through by imposing a combination of tax increases and expenditure cuts that avoided involuntary personnel reductions. Today, the financial imbalance in many school districts is so larg...

The sharp bounds for the third and fourth coefficients of Ma-Minda starlike functions having fixed second coefficient are determined. These results are proved by using certain constraint coefficient problem for functions with positive real part whose coefficients are real and the first coefficient is kept fixed. Analogous results are obtained for a general class of close-to-convex functions