The joining of duplex stainless steel was attempted by electron beam and laser beam welding, introducing nickel and nitrogen into the weld metals by different means. The addition of nickel and nitrogen has a significant role on the microstructure, phase balance and impact toughness, but it seems to have no appreciable influence on hardness. © 2005 Elsevier B.V. All rights reserved.

Suresh Krishnamoorthy Seshadri

Electron beam welding

Filler metals

Fracture toughness

Laser Beam Welding

Mechanical properties

microstructure

Nickel

nitrogen

VICKERS HARDNESS TESTING

DUPLEX STAINLESS STEEL (DSS)

EXTENDED FERRITE NUMBER (EFN)

PHASE BALANCE

PRE-PLACED FILLERS

Stainless steel

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Materials Letters

In the present review, attempts have been made to analyze the metallurgical, mechanical, and corrosion properties of commercial marine alloy duplex stainless steel AISI 2205 with special reference to its weldability, machinability, and surfacing. In the first part, effects of various fusion and solid-state welding processes on joining DSS 2205 with similar and dissimilar metals are addressed. Microstructural changes during the weld cooling cycle such as austenite reformation, partitioning of alloying elements, HAZ transformations, and the intermetallic precipitations are analyzed and compared with the different welding techniques. In the second part, machinability of DSS 2205 is compared with the commercial ASS grades in order to justify the quality of machining. In the third part, the importance of surface quality in a marine exposure is emphasized and the enhancement of surface properties through peening techniques is highlighted. The research gaps and inferences highlighted in this review will be more useful for the fabrications involved in the marine applications. © 2017

Fulltext

Journal of Advanced Research

Weldability, machinability and surfacing of commercial duplex stainless steel AISI2205 for marine applications – A recent review

The excellent combination of strength and corrosion resistance in duplex stainless steels (DSS) is due to their strict composition control and microstructural balance. The ferrite-austenite ratio is often upset in DSS weld metals owing to the rapid cooling rates associated with welding. To achieve the desired ferrite-austenite balance and hence properties, either the weld metal composition and/or the heat input is controlled. In the current work, a low heat input process viz., EBW and another commonly employed process, gas tungsten-arc welding have been employed for welding of DSS with and without nickel enhancement. Results show that (i) chemical composition has got a greater influence on the ferrite-austenite ratio than the cooling rate, (ii) and even EBW which is considered an immature process in welding of DSS, can be employed provided means of filler addition could be devised. © 2003 Elsevier Science B.V. All rights reserved.

Materials Science and Engineering A

Effect of weld metal chemistry and heat input on the structure and properties of duplex stainless steel welds

Duplex Stainless Steels

Corrosion Resistance Properties

Metal Powder Report

World Buyers' Guide 2006/7

Encyclopedia of Materials: Science and Technology

Stainless Steels: Duplex

Exploiting Advances in Arc Welding Technology

The GMAW-STT, an advanced welding process for root pipe and sheet welding

Effect of nickel and nitrogen addition on the microstructure and mechanical properties of power beam processed duplex stainless steel (UNS 31803) weld metals

Journal	Materials Letters
ISSN	0167577X
Open Access	No