Produção Nacional
Revisado por pares
Strengthening of stainless steel weldment by high temperature precipitation
2017; Elsevier BV; Volume: 6; Issue: 4 Linguagem: Inglês
10.1016/j.jmrt.2017.09.001
ISSN2214-0697
AutoresSérgio Neves Monteiro, Lúcio Fábio Cassiano Nascimento, Édio Pereira Lima Júnior, Fernanda Santos da Luz, Eduardo de Sousa Lima, Fábio de Oliveira Braga,
Tópico(s)Fire effects on concrete materials
ResumoThe mechanical behavior and the strengthening mechanism of stainless steel welded joints at 600 °C have been investigated. The welds were composed of AISI 304 stainless steel, as base metal, and niobium containing AISI 347 stainless steel, as weld metal. The investigation was conducted by means of creep tests. The welded specimens were subjected to both high temperature (600 °C) and long periods (up to 2000 h) under constant load, and both mechanical properties and microstructural changes in the material were monitored. It was found that the exposure of the material at 600 °C under load contributes to a strengthening effect on the weld. The phenomenon might be correlated with an accelerated process of second phase precipitation hardening.
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