Searched for: author:"Agarwal, G."
(1 - 11 of 11)
document
Agarwal, G. (author)
Preventing solidification cracking is an essential prerequisite for the safety of a welded structure. An undetected solidification crack has the potential to cause premature failure during service. Two conditions generated by a weld thermal cycle are responsible for the initiation of solidification cracks. The first is the presence of excessive...
doctoral thesis 2019
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Kumar, A. (author), Agarwal, G. (author), Petrov, R.H. (author), Goto, S. (author), Sietsma, J. (author), Herbig, M. (author)
The formation of White (WEL) and Brown Etching Layers (BEL) on rail raceways during service causes the initiation of microcracks which finally leads to failure. Detailed characterization of the WEL and the BEL in a pearlitic rail steel is carried out from micrometer to atomic scale to understand their microstructural evolution. A...
journal article 2019
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Agarwal, G. (author), Kumar, A. (author), Richardson, I.M. (author), Hermans, M.J.M. (author)
Solidification cracking susceptibility during laser welding was studied experimentally and numerically in advanced high strength steel sheets, namely transformation-induced plasticity (TRIP) and dual phase (DP) steel. Using the same heat input, laser bead-on-plate welding was carried out on single sided clamped specimens at various starting...
journal article 2019
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Li, Jie (author), Groeblacher, S. (author), Zhu, Shi-Yao (author), Agarwal, G. S. (author)
journal article 2018
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Agarwal, G. (author), Gao, H. (author), Amirthalingam, M. (author), Richardson, I.M. (author), Hermans, M.J.M. (author)
Advanced high-strength steels (AHSS), which are increasingly used in the automotive industry, meet many functional requirements such as high strength and crash resistance. Some of these steels contain high amounts of alloying elements, which are required to achieve the necessary mechanical properties, but render these steels susceptible to weld...
conference paper 2018
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Gao, H. (author), Agarwal, G. (author), Amirthalingam, M. (author), Hermans, M.J.M. (author), Richardson, I.M. (author)
Hot cracking during laser welding of Transformation Induce Plasticity (TRIP) steel at the edges of steel flanges can be a problem. In this study, modified hot cracking tests were performed by welding on a single-side clamped specimen at various distances from the free edge, while the heat input and external constraints remained constant. In situ...
journal article 2018
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Agarwal, G. (author), Gao, H. (author), Amirthalingam, M. (author), Hermans, M.J.M. (author)
Susceptibility to weld solidification cracking in transformation-induced plasticity steel sheets was studied using a modified standard hot cracking test used in the automotive industry. To vary the amount of self-restraint, bead-on-plate laser welding was carried out on a single-sided clamped specimen at increasing distances from the free...
journal article 2018
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Agarwal, G. (author), Amirthalingam, M. (author), Moon, S. C. (author), Dippenaar, R. J. (author), Richardson, I.M. (author), Hermans, M.J.M. (author)
Sufficient liquid feeding under constrained solidification conditions like, those experienced in welding and casting, is vital to avoid solidification cracking. We present the results of unique in-situ experimental observations of liquid feeding in a solidifying steel melt pool. Liquid feeding was observed in the inter-cellular regions during...
journal article 2018
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Agarwal, G. (author), Kumar, A. (author), Gao, H. (author), Amirthalingam, M. (author), Moon, S. C. (author), Dippenaar, R. J. (author), Richardson, I.M. (author), Hermans, M.J.M. (author)
In situ high-temperature laser scanning confocal microscopy is applied to study solidification cracking in a TRIP steel. Solidification cracking was observed in the interdendritic region during the last stage of solidification. Atom probe tomography revealed notable enrichment of phosphorus in the last remaining liquid. Phase field...
journal article 2018
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Agarwal, G. (author), Gao, H. (author), Amirthalingam, M. (author), Hermans, M.J.M. (author)
In situ strain evolution during laser welding has been measured by means of digital image correlation to assess the susceptibility of an advanced high strength automotive steel to solidification cracking. A novel method realised using auxiliary illumination and optical narrow bandpass filter allowed strain measurements as close as 1.5 mm from...
journal article 2018
document
Gao, H. (author), Agarwal, G. (author), Amirthalingam, M. (author), Hermans, M.J.M. (author)
Hot cracking during laser welding of advanced high-strength steels is reported to be a serious problem by automotive manufacturers. In this work, hot cracking susceptibilities of transformation-induced plasticity (TRIP) and dual-phase (DP) steels are studied based on a multi-scale modelling approach. Transient temperatures measured from...
journal article 2017
Searched for: author:"Agarwal, G."
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