Enhancement of Impact Toughness in Mild Steel Weldments under Low Temperature Applications

Manjinder Singh; Jasvinder Singh; Vivek Sharma

doi:10.4028/www.scientific.net/KEM.833.23

Paper Titles

Effect of Cold Rolling and Annealing Temperature on the Characteristics of Cu-28Zn-5.5Al Alloy Produced by Gravity Casting for Bullet Case Application
p.3

Investigation on Mechanical Properties of Blend Virgin and Recycled Acrylonitrile-Butadiene-Styrene (ABS) in Injection Molding
p.8

Cooling Rate Observation in Quenching Process Using Carbon Nanofluids for S45C Carbon Steel
p.13

Sustainable Turning of Biocompatible Materials Using Eco Nano-Mist Technique
p.18

Enhancement of Impact Toughness in Mild Steel Weldments under Low Temperature Applications
p.23

Solving the Laser Cutting Path Problem Using Population-Based Simulated Annealing with Adaptive Large Neighborhood Search
p.29

Multi-Response Optimization of Dissimilar Al-Ti Alloy FSW Using Taguchi - Grey Relational Analysis
p.35

Designs and Evaluations of a Gas Atomizer to Fabricate Stainless Steel Metal Powder to Be Applied at a Metal Injection Molding
p.40

A Comparative Study of EDD and PM-EDD in Producing Holes in Inconel 718 Alloy
p.48

HomeKey Engineering MaterialsKey Engineering Materials Vol. 833Enhancement of Impact Toughness in Mild Steel...

Enhancement of Impact Toughness in Mild Steel Weldments under Low Temperature Applications

Abstract:

In this research, mild steel weldments are tested by varying nickel content into the weld beads. Three mild steel plates have been joined using three electrodes with similar chemical composition except nickel content 0%, 9-11% and 19-21% respectively, by SMAW process and keeping heat input constant at all. The performance of welded specimens was evaluated by Charpy V-notch impact tests under different temperature conditions (25°C, 0°C, -20°C, -40°C, -60°C). It was found that the weldment with 0% nickel content is suffering rapid transition from ductile to brittle at-60°C, thus toughness reduces to approximately 1/5th of its value at room temperature. Microstructure revealed that at inter-dendritic regions mainly martensite was found. In dendrite core regions of the low carbon weld metals, a mixture of upper bainite, lower bainite and a novel constituent coalesced bainite formed. The fractured surface pattern was also observed using SEM, to reveal the ratio of area underwent ductile or brittle type of failure.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Key Engineering Materials (Volume 833)

Pages:

23-28

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.833.23

Citation:

Cite this paper

Online since:

March 2020

Authors:

Manjinder Singh*, Jasvinder Singh, Vivek Sharma

Keywords:

DBTT, PWHT, SMAW

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

* - Corresponding Author

References

[1] Wang, Y.M., Voisin, T., McKeown, J.T. et al., 2018. Additively manufactured hierarchical stainless steels with high strength and ductility, nature materials. Nat. Mater. 17, 63-71.

DOI: 10.1038/nmat5021

Google Scholar

[2] Kwon, H., Kim, C.H., 1986. Fracture behavior in medium-carbon martensitic Si- and Ni-steels. Metall. Trans. A 17, 1173-1178.

DOI: 10.1007/bf02665316

Google Scholar

[3] Qiu JA, Wu KM, Li JH, Hodgson PD, Hou TP, Ding QF. ScienceDirect Effect of silicon on ultra-low temperature toughness of Nb – Ti microalloyed cryogenic pressure vessel steels 2013;83:1–6.

DOI: 10.1016/j.matchar.2013.06.013

Google Scholar

[4] Needleman a., Tvergaard V. A micromechanical analysis of the ductile-brittle transition at a weld. Eng Fract Mech 1999; 62:317–38.

DOI: 10.1016/S0094-114X(98)00094-9

Google Scholar

[5] Razzak, M. A. (2011). Heat treatment and effects of Cr and Ni in low alloy steel. Bulletin of Materials Science, 34(7), 1439–1445.

DOI: 10.1007/s12034-011-0340-9

Google Scholar

[6] Lee CH, Shin HS, Park KT, Chang KH. Impact fracture energy of structural steel welds constructed at low ambient temperatures. Constr Build Mater 2014; 50: 394–400.

DOI: 10.1016/j.conbuildmat.2013.09.043

Google Scholar

[7] Šmida T, Magula V. Brittle to ductile transition - An engineer's point of view. Mater Des 2014; 54: 582–6.

DOI: 10.1016/j.matdes.2013.08.039

Google Scholar

[8] Zerbst U, Ainsworth RA, Beier HT, Pisarski H, Zhang ZL, Nikbin K, et al. Review on fracture and crack propagation in weldments - A fracture mechanics perspective. Eng Fract Mech 2014; 132:200–76.

DOI: 10.1016/j.engfracmech.2014.05.012

Google Scholar