The heat-affected zone

Easterling, K. E.

doi:10.1016/b978-0-7506-0394-2.50008-3

Cited by 10 publications

(4 citation statements)

References 8 publications

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“…According to this model, the cooling rate for 1·5 mm thickness is ∼4000 K s −1 . For steels, the required critical cooling rate to achieve martensite in the microstructure can be estimated using the following equation16 where v is the critical cooling rate in K h −1 . The calculated critical cooling rate for the investigated steels is ∼3885 K s −1 .…”

Section: Resultsmentioning

confidence: 99%

Failure of resistance spot welds: tensile shear versus coach peel loading conditions

Pouranvari

Marashi

2012

Ironmaking & Steelmaking

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This paper aims at investigating the failure behaviour of resistance spot welds under tensile shear (TS) and coach peel (CP) loading conditions. A failure mechanism was proposed to describe both interfacial and pullout failure modes in each loading condition. The mechanisms were confirmed by SEM investigations, examining the cross-sections of the fractured welds to detail the fracture path. The experimental results showed that in the pullout failure mode during TS testing, necking is initiated at the nugget circumference in the base metal, and then failure propagates along the nugget circumference in the sheet, leading to the final fracture, while pullout failure during the CP test occurred by crack initiation and propagation near the weld nugget/heat affected zone boundary. The interfacial failure to pullout failure mode transition in the TS and CP tests was also studied. The critical weld nugget size required to ensure the pullout failure mode was obtained for each loading condition. The critical fusion zone size to ensure pullout failure mode during the TS test was larger than that of the CP test. It was found that the load bearing capacity of the spot welds under CP is significantly lower than that of the TS test.

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Section: Resultsmentioning

confidence: 99%

Failure of resistance spot welds: tensile shear versus coach peel loading conditions

Pouranvari

Marashi

2012

Ironmaking & Steelmaking

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“…An efficient formula for hardness prediction presented by Blondean etc. is given by the expressions [7,8]:…”

Section: Results and Discussion Shcct Diagrammentioning

confidence: 99%

Prediction of Hardness in Heat Affected Zone of 9%Ni Steel

Yan

Yang

Zhao

et al. 2012

AMR

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Various methods have been introduced to predict postweld hardness of the heat affected zone (HAZ) for 9% Ni steel which is a primary steel adopted in the construction of liquefied natural gas (LNG) storage facilities. Two models were derived for the evaluation of the HAZ hardness, and then validated. The formulae developed in this investigation are sufficient to predict the hardness of the HAZ for 9% Ni steel . For the model using a rule of mixture, it is suggested that the morphology of martensite should be taken into consideration. Since the prediction of hardness depends on the calculation of the critical cooling time and hardness of microstructural constituents, a formula to estimate the hardness of martensite in HAZ was given. For empirical equation relating welding parameters, calculation results were found to give a fairly good description of the postweld HAZ hardness.

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“…Esses resultados demonstram a influência que o grau de encruamento (têmpera) do material exerce sobre a quantidade de recristalização que pode ser promovida ao longo do material, para a formação da ZAC durante a soldagem. A relação que há entre formação da ZAC e grau de encruamento já é conhecida na literatura (EASTERLING, 1983), no entanto, não é quantificado na literatura a dimensão que a ZAC pode atingir em função de um determinado grau de encruamento, informação esta que foi obtida neste trabalho, conforme mostrado na Tabela 5.3 e ilustrado na Figura 5.10.…”

Section: Largura Da Zac (µM)unclassified

“…Esses valores da literatura não podem ser adotados como valor de temperatura de recristalização na ZAC, porque não correspondem à cinética de ciclo térmico que é observada no material durante a soldagem, além do elevado gradiente de temperatura que ocorre no material, gradiente esse que explica a variação de granulometria ao longo da ZAC (EASTERLING, 1983).…”

Section: Largura Da Zac (µM)unclassified

Proposta de modelo para caracterizar susceptibilidade a distorção devido a soldagem em chapas de aluminio

Fraga¹,

Trevisan²

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AgradecimentosA conclusão deste trabalho representa uma grande meta para se alcançar um objetivo maior de vida. Este trabalho não poderia ser terminado sem o apoio e colaboração de diversas pessoas às quais desejo prestar meus agradecimentos: À Professora Dra. Roseana Trevisan pela orientação, empenho e colaboração nesta tese e, principalmente, pela grande amizade, compreensão e apoio durante estes anos de trabalho.

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The heat-affected zone

Cited by 10 publications

References 8 publications

Failure of resistance spot welds: tensile shear versus coach peel loading conditions

Failure of resistance spot welds: tensile shear versus coach peel loading conditions

Prediction of Hardness in Heat Affected Zone of 9%Ni Steel

Proposta de modelo para caracterizar susceptibilidade a distorção devido a soldagem em chapas de aluminio

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