Microstructure and Residual Stresses in a Friction Stir Welded Butt Joint of as-cast ZK60 Alloy Containing Rare Earths

Autor(es)

Erenilton Pereira da Silva ^[1] ; Verona Biancardi Oliveira ^[2] ; Victor Ferrinho Pereira ^[3] ; Omar Maluf ^[4] ; Ricardo Henrique Buzolin ^[5] ; Haroldo Cavalcanti Pinto ^[6]

Afiliação do(s) autor(es)

^[1] University of São Paulo. Engineering School of São Carlos. Department of Materials Engineering - Brasil

^[2] University of Rio de Janeiro State. Polytecnic Institute. Department of Materials - Brasil

^[3] Brazilian Nanotechnology National Laboratory - Brasil

^[4] Faculty of Technology of Sertãozinho - Brasil

^[5] University of São Paulo. Engineering School of São Carlos. Department of Materials Engineering - Brasil

^[6] University of São Paulo. Engineering School of São Carlos. Department of Materials Engineering - Brasil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 20, n. 3, p. 775-779, 2017-04-27.

Resumo

The effect of a travel speed of 200 mm/min as well as a tool rotational speed of 1200 rpm on butt joint quality of friction stir welding (FSW) ZK60 magnesium casting alloy containing 1.5 wt.% rare earths (ZK60-1.5RE) was investigated to determine microstructure and residual stresses. FSW results in the generation of heterogeneous metallurgical structures consisting of the base material (BM), stirred zone (SZ) and thermo-mechanical affected zone (TMAZ). The stirring action also produced a non-uniform distribution and segregation of intermetalics. The transversal distribution of the longitudinal welding stresses exhibits a "M-like" shape with mostly tensile stresses under the shoulder region and only one compressive stress peak in the advancing side of the SZ and TMAZ. It could be demonstrated that FSW of ZK60-1.5RE alloy was successful in the welding conditions applied during the present work. (AU)

• Processo FAPESP: 11/19218-0 - Fundição, tratamento térmico e caracterização de ligas de magnésio ZK60-RE para aplicações em estruturas aeronáuticas
• Beneficiário: Ivan Feierabend
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 11/09324-8 - Junção por fricção e mistura mecânica em ligas tixofundidas de magnésio de alto desempenho
• Beneficiário: Erenilton Pereira da Silva
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 10/11391-2 - Junção por fricção e mistura mecânica em ligas tixofundidas de magnésio de alto desempenho
• Beneficiário: Haroldo Cavalcanti Pinto
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores