Chapter 11
Fatigue Analysis of Dissimilar Metal
Welded Joints of 316L Stainless
Steel/Monel 400 Alloy Using GTAW
Cherish Mani, B. Sozharajan, R. Karthikeyan, and J. Paulo Davim
Abstract Fatigue performance analysis of weld joints of Monel 400 and stainless
steel 316L (SS 316L) using Gas Tungsten Ac Welding (GTAW) process is presented.
Dissimilar metal welding is considered as the most perplexing task when compared
to the similar metals joining by welding. Dissimilar weld joints based on austenitic
stainless steels are extensively utilized in many applications of high temperature
systems of energy conversion. Monel alloys are widely used in many fields especially
in oil and gas and has excellent resistance capacity to many corrosive environments.
ERNiCrFe-5 is used as filler for welding of the dissimilar metal combination chosen.
The welded joints of steel structures are easily affected by fatigue/alternative loading
once it is subjected to service. Experimental results were used to fit the S-N curve, and
corrected endurance strength and fatigue life were predicted based on Eurocode3.
Fatigue damage theory has been used to quantify the accumulated damage. Fracture
morphology has been analysed using SEM to assess the crack initiation and type of
failure.
Keywords Welding of dissimilar metals · GTAW · SS 316L · Monel 400 ·
Microhardness · Fatigue analysis
11.1 Introduction
The welding of dissimilar metals, when compared with the conventional welding, is
the joining of two identical metals that would generally not weld together as they
have diverse mechanical and chemical characteristics. Certain characteristics of the
metals to be welded are their point of evaporation, melting point, material strength,
compatibility and chemical composition. Regardless of these impediments, there
is a requirement to weld such dissimilar materials for different purposes inclusive
C. Mani · B. Sozharajan · R. Karthikeyan (B)
Department of Mechanical Engineering, BITS, Pilani, Dubai Campus, Dubai, UAE
e-mail: rkarthikeyan@dubai.bits-pilani.ac.in
J. Paulo Davim
Department of Mechanical Engineering, University of Aveiro, Aveiro, Portugal
© Springer Nature Switzerland AG 2021
J. P. Davim (ed.), Welding Technology, Materials Forming, Machining
and Tribology, https://doi.org/10.1007/978-3-030-63986-0_11
369
Fatigue Analysis of Dissimilar Metal
Welded Joints of 316L Stainless
Steel/Monel 400 Alloy Using GTAW
Cherish Mani, B. Sozharajan, R. Karthikeyan, and J. Paulo Davim
Abstract Fatigue performance analysis of weld joints of Monel 400 and stainless
steel 316L (SS 316L) using Gas Tungsten Ac Welding (GTAW) process is presented.
Dissimilar metal welding is considered as the most perplexing task when compared
to the similar metals joining by welding. Dissimilar weld joints based on austenitic
stainless steels are extensively utilized in many applications of high temperature
systems of energy conversion. Monel alloys are widely used in many fields especially
in oil and gas and has excellent resistance capacity to many corrosive environments.
ERNiCrFe-5 is used as filler for welding of the dissimilar metal combination chosen.
The welded joints of steel structures are easily affected by fatigue/alternative loading
once it is subjected to service. Experimental results were used to fit the S-N curve, and
corrected endurance strength and fatigue life were predicted based on Eurocode3.
Fatigue damage theory has been used to quantify the accumulated damage. Fracture
morphology has been analysed using SEM to assess the crack initiation and type of
failure.
Keywords Welding of dissimilar metals · GTAW · SS 316L · Monel 400 ·
Microhardness · Fatigue analysis
11.1 Introduction
The welding of dissimilar metals, when compared with the conventional welding, is
the joining of two identical metals that would generally not weld together as they
have diverse mechanical and chemical characteristics. Certain characteristics of the
metals to be welded are their point of evaporation, melting point, material strength,
compatibility and chemical composition. Regardless of these impediments, there
is a requirement to weld such dissimilar materials for different purposes inclusive
C. Mani · B. Sozharajan · R. Karthikeyan (B)
Department of Mechanical Engineering, BITS, Pilani, Dubai Campus, Dubai, UAE
e-mail: rkarthikeyan@dubai.bits-pilani.ac.in
J. Paulo Davim
Department of Mechanical Engineering, University of Aveiro, Aveiro, Portugal
© Springer Nature Switzerland AG 2021
J. P. Davim (ed.), Welding Technology, Materials Forming, Machining
and Tribology, https://doi.org/10.1007/978-3-030-63986-0_11
369