scispace - formally typeset
Search or ask a question
Journal ArticleDOI

Modeling flux chemistry for submerged arc weldments of high-strength low-alloy steel

TL;DR: In this paper, the chemical and mechanical properties of the welded joint are greatly affected by flux composition, and the resulting chemical compositions of C, Si, Mn, P and S in the weld metal have been studied using...
Abstract: Chemical and mechanical properties of the welded joint are greatly affected by flux composition. The resulting chemical compositions of C, Si, Mn, P and S in the weld metal have been studied using ...
Citations
More filters
Journal ArticleDOI
TL;DR: In this paper, physicochemical and thermophysical properties of TiO2-SiO 2-MgO and SiO2 MgO-Al2O3 based rutile acidic SAW fluxes were studied.

27 citations

Journal ArticleDOI
01 Jul 2019-JOM
TL;DR: In this paper, the physicochemical and thermophysical behavior of the electrode coatings produced using CaO-CaF2-SiO2 and CaO -SiO 2-Al2O3 ternary phase systems were investigated.
Abstract: This study aims to investigate the physicochemical and thermophysical behavior of the electrode coatings produced using CaO-CaF2-SiO2 and CaO-SiO2-Al2O3 ternary phase systems. Electrode coating compositions for welding power plant materials are either patented or not available in the public domain so researchers need to explore the flux coatings to improve the properties of welds produced. An extreme vertices design methodology was used to obtain the different flux combinations to study the effect of electrode coating constituents on weight loss, density, specific heat, change in enthalpy, thermal diffusivity and thermal conductivity. These properties play an important role in achieving better weld quality. X-ray diffraction and Fourier-transform infrared spectroscopy techniques were used to analyze the different phases present and their structural behavior. Multi-response optimization was carried out to obtain the optimum flux composition and study the effect of individual constituents and their interaction effects on the thermophysical and physicochemical properties.

26 citations

Journal ArticleDOI
01 Aug 2019
TL;DR: Submerged arc welding is widely used in pipeline manufacturing due to higher efficiency as compared to the other welding processes in this article, TiO2SiO2-CaO and SiO2CaO-Al2O3-based submerge
Abstract: Submerged arc welding is widely used in pipeline manufacturing due to higher efficiency as compared to the other welding processes In present study, TiO2-SiO2-CaO and SiO2-CaO-Al2O3–based submerge

21 citations

Journal ArticleDOI
TL;DR: In this article, physicochemical and thermo-physical properties of slags obtained from CaO-CaF2-SiO2-Al2O3 based shielded metal arc welding electrodes were investigated.

18 citations

Journal ArticleDOI
01 Jul 2002

18 citations

References
More filters
Journal ArticleDOI
TL;DR: In this article, the authors present a set of conditions that will result in a product with a desirable combination of properties, which is a problem facing the product development community in general.
Abstract: A problem facing the product development community is the selection of a set of conditions which will result in a product with a desirable combination of properties. This essentially is a problem i...

4,109 citations


"Modeling flux chemistry for submerg..." refers methods in this paper

  • ...Simultaneous optimization of these output responses has been done using composite desirability optimization method suggested by Derringer and Suich.(28) This method makes use of an objective function D(x), called desirability function which transforms an estimated response into a value called composite desirability....

    [...]

Journal Article

520 citations


"Modeling flux chemistry for submerg..." refers background in this paper

  • ...versa.(13) So positive and negative values of regression coefficient, bij define synergistic and anti-synergistic effects of the binary mixtures, respectively....

    [...]

Journal ArticleDOI
TL;DR: Modified desirability functions that are everywhere differentiable are presented so that more efficient gradient-based optimization methods can be used instead of search methods to optimize the overall desIRability response.
Abstract: Desirability functions have been used extensively to simultaneously optimize several responses. Since the original formulation of these functions contains non-differentiable points, only search methods can be used to optimize the overall desirability response. Furthermore, all responses are treated as equally important. We present modified desirability functions that are everywhere differentiable so that more efficient gradient-based optimization methods can be used instead. The proposed functions have the extra flexibility of allowing the analyst to assign different priorities among the responses. The methodology is applied to a wire bonding process that occurs in semiconductor manufacturing, an industrial process where multiple responses are common.

356 citations

Proceedings ArticleDOI
11 Oct 1998
TL;DR: Critical issues that can arise from blind adherence to the concept of a "desirability function" are demonstrated.
Abstract: First introduced in 1965, the concept of a "desirability function" has gained wide acceptance as a method of determining parameter settings to optimize a process with multiple output measurements. Unfortunately, little attention has been paid to the underlying assumptions of decision theory on which the procedure is based. This paper demonstrates critical issues that can arise from blind adherence to this procedure.

229 citations


"Modeling flux chemistry for submerg..." refers background in this paper

  • ...The factor settings with maximum total desirability are considered to be the optimal parameter combinations.(29) The composite desirability is given by(30)...

    [...]

Journal ArticleDOI
TL;DR: In this paper, mathematical models have been developed for SAW of pipes using five level factorial techniques to predict three critical dimensions of the weld bead geometry and shape relationships, and the models developed have been checked for their adequacy and significance by using the F -test and the t -test, respectively.

165 citations