H. Naffakh,, M. Shamanian, F. Ashrafizadeh,
Volume 5, Issue 3 (9-2008)
Abstract
Abstract: The investigation is carried out to characterize welding of AISI 310 austenitic stainless
steel to Inconel 657 nickel-chromium superalloy. The welds were produced using four types of
filler materials: the nickel-based corresponding to Inconel 82, Inconel A, Inconel 617 and
austenitic stainless steel 310. This paper describes the effects of aging treatment on the joint. The
comparative evaluation was based on microstructural features and estimation of mechanical
properties. While Inconel A exhibited highest thermal stability and mechanical properties
(hardness and ultimate strength), Inconel 82 weld metal also showed good thermal stability and
mechanical properties. On the other hand, welds produced with Inconel 617 and 310 SS filler
materials showed weak thermal stability and failed in the weld metals. It is therefore concluded
that for the joint between Inconel 657 and 310 stainless steel, Inconel A and Inconel 82 filler
materials offered the best compromises, respectively.
S. Giridhar Reddy, A. Thakur,
Volume 15, Issue 3 (9-2018)
Abstract
Biodegradable polymer blends are prepared by solution casting method by mixing Sodium alginate (SA) and Lignosulphonic acid (LS) biodegradable polymers. In order to investigate for controlled drug delivery the thermal stability of polymer blends are the primary requirements because they should be stable in aqueous medium. The polymer blends are studied using thermogravimetric analysis. The TGA data are used to analyze degradation temperature and energy of activation using ‘Horowitz and Metzger’ an approximate integral method. The energy of activation reveals that blends are stable as compared to their polymers.
