✍ Scribed by Matevž Fazarinc; Tadej Muhič; Alenka Šalej; David Bombač; Peter Fajfar; Milan Terčelj; Goran Kugler
No coin nor oath required. For personal study only.
Thermal fatigue resistance is one of the most important characteristics of the materials subjected to rapid temperature changes, i.e., high-pressure die casting, hot forging. Therefore the aim of the present study was to determine the suitability of using the functionally graded materials (FGM) in applications subjected to thermal fatigue. A specially designed thermal fatigue test was utilized, developed to be used on servo-hydraulic testing machine, Gleeble 1500D. The FGM samples were prepared using a laser cladding method that ensures sound welds. Two different filler materials on the AISI H13 tool steel were utilized, varying in the content of the silicon. The gradation in the properties was made by changing silicon content with varying welding parameters, and thus achieving gradation of the secondary carbide content. The test results show that the silicon distribution has large effect on thermal fatigue resistance; the resistance is decreasing with the increasing the content of silicon in the filler material. This was studied through the sequence of crack formation. The results of this study will contribute to prolonged use of die casting tools.
📜 SIMILAR VOLUMES
This paper addresses finite element evaluation of the non-singular T-stress and mixed-mode stress intensity factors in functionally graded materials (FGMs) under steady-state thermal loads by means of interaction integral. Interaction integral provides an accurate and efficient numerical framework i
Three-dimensional thermal buckling analysis is performed for functionally graded materials. Material properties are assumed to be temperature dependent, and varied continuously in the thickness direction according to a simple power law distribution in terms of the volume fraction of a ceramic and me
This paper presents domain form of the interaction integrals based on three independent formulations for computation of the stress intensity factors and electric displacement intensity factor for cracks in functionally graded piezoelectric materials subjected to steady-state thermal loading. Each of
The homogenisation theory for periodic composites is generalised to the case of quasi-periodic composites. In quasi-periodic composites, the unit cell does not repeat throughout the medium but gradually changes along one or more directions of periodicity (grading directions). Quasi-periodic composit