Increase of bending fatigue resistance for tungsten inert gas welded SS400 steel plates using friction stir processing

Autor:	Rintaro Ueji, Hidetoshi Fujii, Chiaki Shiga, Tatsuya Okuda, Kazuhiro Ito
Rok vydání:	2014
Předmět:	Materials science Friction stir processing Gas tungsten arc welding Metallurgy chemistry.chemical_element Welding Tungsten law.invention Stress (mechanics) Flexural strength chemistry law Ultimate tensile strength Composite material Inert gas
Zdroj:	Materials & Design. 61:275-280
ISSN:	0261-3069
Popis:	To improve the fatigue resistance of tungsten inert gas (TIG)-welded SS400 steel plates, friction stir processing (FSP) was performed on TIG weld beads. Although the tensile properties of the TIG-welded steel plates with FSP were similar to those without FSP, their bending strength exhibited about 1.4 GPa at room temperature, which was 40% higher than that without FSP (about 1 GPa). Similarly, FSP produced about 170% increase in the number of cycles to failure at an applied stress amplitude of 270 MPa during three-point bending fatigue at room temperature. A fine-grained FSP region (grain sizes of about 1–2 μm in diameter) enhanced grain-boundary strengthening, leading to the higher bending strength and bending fatigue resistance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e37d965cda7948c9907007cba64e455a https://doi.org/10.1016/j.matdes.2014.04.076 Zobrazit plný text záznamu Full Text from ScienceDirect