Communications - Scientific Letters of the University of Zilina 2009, 11(1):22-26 | DOI: 10.26552/com.C.2009.1.22-26
Fatigue Resistance of High-Thickness Al-Alloy Sheets after Water Jet Cutting
- 1 SVUM a.s., Areal VU 565, CZ-19011 Praha 9, Czech Republic
Water jet cutting is a useful advanced technology of separating materials with a great industrial potential due to high cutting speed, precision, shape repeatability and possibilities to be performed automatically with a computer control. It is well known, however, that fatigue properties are particularly strongly affected by surface conditions and quality of surface layer. Water jet cutting was applied to Al-alloy sheets of fairly high thickness, namely 50.8 mm. Fatigue resistance of water cut specimens and failure mechanisms were investigated and compared with those studied using a reference batch of specimens manufactured by fine milling. Character of surface damage caused by water jet cutting resulted in a considerable reduction of fatigue strength in comparison with milled surface. The results are discussed considering microscopic analysis of surface and subsurface conditions of fatigue crack initiation.
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Published: March 31, 2009 Show citation
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