Tensile properties of thin-sheet metals after cyclic damage

✍ Scribed by J. Galán López; P. Verleysen; I. De Baere; J. Degrieck

• Publisher: Elsevier
• Year: 2011
• Tongue: English
• Weight: 816 KB
• Volume: 10
• Category: Article
• ISSN: 1877-7058
• DOI: 10.1016/j.proeng.2011.04.325

✦ Synopsis

The mechanical response of a material is most often assessed without taking any possible previous damage into account. However, a fresh condition is exceptional when the material is actually used. Moreover, it has been proved that a preceding cyclic loading has a significant influence on the mechanical properties of some materials, and hence on the behaviour of structural elements made of them. This study investigates the effect of cyclic loading on the mechanical properties of metals in thin-sheet form, with special emphasis on the titanium alloy Ti-6Al-4V. First, a classical characterization is performed on the material, in which its mechanical properties are determined by means of different fatigue and tensile experiments. Then, the microstructural changes induced by cyclic loading are studied, taking into account that fatigue can affect the bulk of the material and its surface in different ways. Finally, the mechanical (tensile) properties of specimens subjected to a number of loading cycles are determined and the results for Ti-6Al-4V are discussed and compared with several grade steels.