Solidification cracking susceptibility of ferritic stainless steels using Modified Varestraint Transvarestraint (MVT) method
| Autor: | M. Du Toit, P. G. H. Pistorius, D. S. Konadu, Axel Griesche |
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| Rok vydání: | 2019 |
| Předmět: |
0209 industrial biotechnology
Multidisciplinary Materials science Gas tungsten arc welding Metallurgy 02 engineering and technology Welding Microstructure Magnetic susceptibility 020501 mining & metallurgy Gas metal arc welding law.invention Cracking 020901 industrial engineering & automation 0205 materials engineering law Weld metal |
| Zdroj: | Sādhanā. 44 |
| ISSN: | 0973-7677 0256-2499 |
| DOI: | 10.1007/s12046-019-1175-0 |
| Popis: | The Modified Varestraint Transvarestraint (MVT) test was used to investigate the solidification cracking susceptibility of an unstabilised, a Nb-stabilised and two (Ti + Nb) dual-stabilised ferritic stainless steels. Two different welding speeds of 6 and 3 mm/s using autogenous gas tungsten arc welding were employed. At the welding speed of 6 mm/s, the high-content (Ti + Nb) steel was resistant and the Nb-stabilised steel was marginally susceptible to solidification cracking. At the welding speed of 3 mm/s, the Nb and the high (Ti + Nb) steels were found to be marginally susceptible to solidification cracking while the unstabilised and low-content (Ti + Nb) grades were resistant to solidification cracking. The weld metal microstructures transverse to the welding direction revealed columnar grains in all the samples for both welding speeds. The ferritic stainless steels were generally resistant to solidification cracking, except the Nb-stabilised steel, which was marginally susceptible to solidification cracking. |
| Databáze: | OpenAIRE |
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