Getting the Strain Under Control: Trans-Varestraint Tests for Hot Cracking Susceptibility
| Autor: | Helen V. Atkinson, John Marsden, D. Statharas, Hongbiao Dong, Rob Thornton, Wen Shuwen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Structural material Materials science Strain (chemistry) Metallurgy Industrial scale 0211 other engineering and technologies Metals and Alloys chemistry.chemical_element 02 engineering and technology Welding Tungsten Strain rate Condensed Matter Physics 01 natural sciences law.invention Cracking chemistry Mechanics of Materials law mental disorders 0103 physical sciences Inert gas 021102 mining & metallurgy |
| Zdroj: | Metallurgical and Materials Transactions A. 50:1748-1762 |
| ISSN: | 1543-1940 1073-5623 |
| Popis: | A new method for conducting Trans-Varestraint tests for assessing hot cracking susceptibility is proposed. Experiments were carried out, to validate the new method, with an industrial scale rig using tungsten inert gas welding. The hot cracking susceptibility of API-5L X65 and EN3B steel was compared. The results indicated that, by using the new method, the strain applied to the welding bead and consequently to the solidification front was controlled in a repeatable and reliable way. The results also indicated that EN3B has a maximum crack length (a parameter in the test) higher than X65 and it is reached at lower augmented strain thus demonstrating it is more susceptible to hot cracking, while also indicating that there is a capability of predicting the initiation position of hot cracks during welding. By using the method proposed, the capability of setting standardized test procedures for Trans-Varestraint tests is improved. It is recommended that future tests for assessing hot cracking susceptibility should employ the proposed method in order for the results to be comparable and to also study the effect of strain rate in hot cracking of materials. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink