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Vahid Hosseini

Postdoktor

Vahid Hosseini

Anställd på Avdelningen för svetsteknologi.


Research interests:

Welding of duplex stainless steels

Welding technology

Arc heat treatment technique

Metallurgy of steels

Solidification of Al-based alloys

Welding of Mg-based alloys

Semisolid metal processing

Teaching:

Physical metallurgy and mechanical properties of metals

Metallography lab.

Welding lab. 

Current projects:

Welding thermal cycle analyses and metallurgical characterizations of duplex stainless steels

Development of a novel heat treatment technique using TIG-arc

Publications:

Information about publications may be found in DivaGoogle Scholar

Publikationer


Ferrite content measurement in super duplex stainless steel welds

Publicerat

Ferrite content measurement in super duplex stainless steel welds

Approaches to determining ferrite fraction (%) and ferrite number (FN) were examined for super duplex stainless steel (SDSS) welds. A reference...

Physical and kinetic simulation of nitrogen loss in high temperature heat affected zone of duplex stainless steels

Publicerat

Physical and kinetic simulation of nitrogen loss in high temperature heat affected zone of duplex stainless steels

High temperature heat affected zone (HTHAZ) of duplex stainless steels is prone to local corrosion attack due to a high ferrite fraction and nitrid...

Wire-arc additive manufacturing of a duplex stainless steel : thermal cycle analysis and microstructure characterization

Publicerat

Wire-arc additive manufacturing of a duplex stainless steel : thermal cycle analysis and microstructure characterization

The evolution of microstructures with thermal cycles was studied for wire-arc additive manufacturing of duplex stainless steel blocks. To produce...

Correction to : Time-temperature-precipitation and property diagrams for super duplex stainless steel weld metals (Welding in the World, (2018), 62, 3, (517-533), 10.1007/s40194-018-0548-z)

Publicerat

Correction to : Time-temperature-precipitation and property diagrams for super duplex stainless steel weld metals (Welding in the World, (2018), 62, 3, (517-533), 10.1007/s40194-018-0548-z)

Unfortunately due to typesetting mistakes, Tables 4-€“6 have been displayed erroneously in the article. © 2018, International Institute of Welding.

Effect of sigma phase morphology on the degradation of properties in a super duplex stainless steel

Publicerat

Effect of sigma phase morphology on the degradation of properties in a super duplex stainless steel

Sigma phase is commonly considered to be the most deleterious secondary phase precipitating in duplex stainless steels, as it results in an extreme...

Microstructure and functionality of a uniquely graded super duplex stainless steel designed by a novel arc heat treatment method

Publicerat

Microstructure and functionality of a uniquely graded super duplex stainless steel designed by a novel arc heat treatment method

A novel arc heat treatment technique was applied to design a uniquely graded super duplex stainless steel (SDSS), by subjecting a single sample to ...

Spinodal Decomposition in Functionally Graded Super Duplex Stainless Steel and Weld Metal

Publicerat

Spinodal Decomposition in Functionally Graded Super Duplex Stainless Steel and Weld Metal

Low-temperature phase separations (T < 500 °C), resulting in changes in mechanical and corrosion properties, of super duplex stainless steel (SDSS)...

Super duplex stainless steels : Microstructure and propertiesof physically simulated base and weld metal

Publicerat

Super duplex stainless steels : Microstructure and propertiesof physically simulated base and weld metal

High-temperature processing and application of super duplex stainless steel(SDSS) are associated with the risk of changes in the ferrite/austenite...

Time-temperature-precipitation and property diagrams for super duplex stainless steel weld metals

Publicerat

Time-temperature-precipitation and property diagrams for super duplex stainless steel weld metals

Super duplex stainless steel (SDSS) weld metal microstructures, covering the complete temperature range from ambient to liquidus, were produced by...

A novel arc heat treatment technique for producing graded microstructures through controlled temperature gradients

Publicerat

A novel arc heat treatment technique for producing graded microstructures through controlled temperature gradients

This paper introduces a novel arc heat treatment technique to produce samples with graded microstructures through the application of controlled...

Effect of multipass TIG welding on the corrosion resistance and microstructure of a super duplex stainless steel

Publicerat

Effect of multipass TIG welding on the corrosion resistance and microstructure of a super duplex stainless steel

This is a study of the effect of repetitive TIG (tungsten inert gas) welding passes, melting and remelting the same material volume on microstructu...

Effect of welding parameters on semisolid stir welding of Mg-9Al-1Zn magnesium alloy

Publicerat

Effect of welding parameters on semisolid stir welding of Mg-9Al-1Zn magnesium alloy

Semisolid stir welding of AZ91 was investigated with focus on the joining temperature and rotational speed. An Mg-25% Zn interlayer was located...

Influence of multiple thermal cycles on microstructure of heat-affected zone in TIG-welded super duplex stainless steel

Publicerat

Influence of multiple thermal cycles on microstructure of heat-affected zone in TIG-welded super duplex stainless steel

The influence of heat input and multiple welding cycles on the microstructure of the heat-affected zone in autogenously TIG-welded 6 mm 2507 type...

Influence of multiple welding cycles on microstructure and corrosion resistance of a super duplex stainless steel

Publicerat

Influence of multiple welding cycles on microstructure and corrosion resistance of a super duplex stainless steel

Super duplex stainless steel (SDSS) has found a wide use in demanding applications such as offshore, chemical and petrochemical industries thanks t...

Monitoring Thermal Cycles in Multi-pass Welding

Publicerat

Monitoring Thermal Cycles in Multi-pass Welding

Differently from any previous investigation in welding, this research work presents a novel development that allows temperature to be measured and...

Nitrogen loss and effects on microstructure in multipass TIG welding of a super duplex stainless steel

Publicerat

Nitrogen loss and effects on microstructure in multipass TIG welding of a super duplex stainless steel

Nitrogen loss is an important phenomenon in welding of super duplex stainless steels. In this study, a super duplex stainless steel was autogenousl...

Study on the eutectic and post-eutectic reactions in LM13 aluminum alloy using cooling curve thermal analysis technique

Publicerat

Study on the eutectic and post-eutectic reactions in LM13 aluminum alloy using cooling curve thermal analysis technique

Effect of non-equilibrium solidification conditions on the eutectic and post-eutectic reactions temperature and percentage of the phases were...

Multipass Autogenous TIG Welding of Super Duplex Stainless

Publicerat

Multipass Autogenous TIG Welding of Super Duplex Stainless

Multipass welding of super duplex stainless steels (SDSS) needs further characterization due to their growing applications inpetrochemical and...

Study of the effect of tool geometry on semisolid stir welding of a AZ91 magnesium alloy

Publicerat

Study of the effect of tool geometry on semisolid stir welding of a AZ91 magnesium alloy

Semisolid stir welding is a newly developed method suitable for joining of the magnesium alloy AZ91. In this study, the effect of tool geometries o...

Forskningsprojekt