Reza Ghomashchi

Prediction of welding stresses in WIC test and its application in pipelines

Publisher: Informa UK Limited

Date: 20-07-2016

DOI: 10.1080/02670836.2016.1200285

A Model of Hydrogen Assisted Cold Cracking in Weld Metal

Publisher: American Society of Mechanical Engineers

Date: 24-09-2012

DOI: 10.1115/IPC2012-90385

Abstract: Due to significant cost and productivity advantages, low heat inputs, high welding speeds, severe loading conditions and the use of cellulosic electrodes in the construction of oil and gas pipelines are unavoidable in Australia. Another significant cost reduction directly related to the tonnage of steel pipe dictates the wider use of higher grade steels, such as X70, X80 or X100. These current tendencies raise a serious concern regarding potential problems associated with weld metal hydrogen assisted cold cracking, HACC. Although there are industry standards and guidelines for the avoidance of hydrogen cracking in the heat affected zone, this is not the case for the weld metal, which is now more likely source of crack initiation in modern pipeline steels. The current paper develops a simplified mathematical model to predict the risk of hydrogen cracking in weld metal. A sensitivity study is conducted to evaluate the effect of various welding parameters and geometry, such as heat input, preheat and ambient temperatures and wall thickness on the risk of hydrogen cracking.

Thermoelectric, Magnetic, and Mechanical Characteristics of Antiferromagnetic Manganese Telluride Reinforced with Graphene Nanoplates

Publisher: Wiley

Date: 15-10-2021

DOI: 10.1002/ADEM.202000816

Understanding the potential of microwave sintering on WC - Co

Publisher: Elsevier BV

Date: 06-2019

DOI: 10.1016/J.IJRMHM.2019.02.007

Quantification of residual stresses in multi-pass welds using neutron diffraction

Publisher: Elsevier BV

Date: 12-2015

DOI: 10.1016/J.JMATPROTEC.2015.07.002

Evolution of weld metal microstructure in shielded metal arc welding of X70 HSLA steel with cellulosic electrodes: A case study

Publisher: Elsevier BV

Date: 09-2015

DOI: 10.1016/J.MATCHAR.2015.07.032

Residual stress- microstructure- mechanical property interrelationships in multipass HSLA steel welds

Publisher: Elsevier BV

Date: 05-2016

DOI: 10.1016/J.JMATPROTEC.2016.01.020

In situ neutron diffraction measurement of strain relaxation in welds during heat treatment

Publisher: Informa UK Limited

Date: 11-12-2016

DOI: 10.1080/13621718.2016.1263437

Investigation of hydrogen assisted cracking in acicular ferrite using site-specific micro-fracture tests

Publisher: Elsevier BV

Date: 2016

DOI: 10.1016/J.MSEA.2015.11.044

Evaluating Mechanical Properties and Failure Mechanisms of Fused Deposition Modeling Acrylonitrile Butadiene Styrene Parts

Publisher: ASME International

Date: 06-2017

DOI: 10.1115/1.4036713

Abstract: This paper presents a comprehensive experimental study in exploring the influence of key printing parameters on mechanical properties and failure mechanisms of acrylonitrile butadiene styrene (ABS) material. Three parameters with three levels—layer thickness (0.09 mm, 0.19 mm, and 0.39 mm), printing plane (XY, YZ, and ZX), and printing orientation (horizontal, diagonal, and vertical)—are considered, which form an L27 experimental design. Following L27, tensile and compressive specimens are fabricated and tested. Young's modulus, yield strength, failure strength, and strain of specimens are measured, evaluated, and compared with their injection-molded counterparts. Experimental results indicate that tensile specimens with a layer thickness of 0.09 mm and printing plane orientation of YZ-H reveal the highest stiffness and failure strength. While injection-molded specimen shows the highest yield strength, ductility of printed specimens is 1.45 times larger than that of injection-molded part. YZ along with XY specimens shows a neat and clean standard fracture failure at 45 deg, where the layers reorient themselves followed by stretching before fracture failure, thus providing sufficient ductility as opposed to ZX specimens, which fail along the direction perpendicular to the loading. Compressive XY-H and XY-D specimens have the highest stiffness and yield strength, and failure mechanisms involve initial compression followed by squeezing of layers leading to compactness followed by breakage due to tearing off or fracture of layers. The findings imply that anisotropy of fused deposition modeling (FDM) parts cannot be avoided and hence the appropriate parameters must be chosen, which satisfy the intended properties of the material subject to specific loading scenario.

Investigating the effects of welding process on residual stresses, microstructure and mechanical properties in HSLA steel welds

Publisher: Elsevier BV

Date: 08-2017

DOI: 10.1016/J.JMAPRO.2017.04.030

University Of Sheffield

Location: United Kingdom of Great Britain and Northern Ireland

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Iran University Of Science And Technology

Location: Iran (Islamic Republic of)

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University Of Cambridge

Location: United Kingdom of Great Britain and Northern Ireland

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Linkage Infrastructure, Equipment And Facilities - Grant ID: LE190100124

Start Date: 05-2019

End Date: 12-2022

Amount: $261,300.00

Funder: Australian Research Council

Industrial Transformation Research Hubs - Grant ID: IH150100003

Start Date: 12-2015

End Date: 06-2022

Amount: $2,611,346.00

Funder: Australian Research Council

Linkage Infrastructure, Equipment And Facilities - Grant ID: LE220100165

Start Date: 12-2022

End Date: 04-2024

Amount: $2,020,000.00

Funder: Australian Research Council