MICROSTRUCTURAL FEATURES EVALUATION OF AGE-HARDENED A 226 CAST ALLOY BY IMAGE ANALYSIS
Journal Title: Production Engineering Archives - Year 2017, Vol 0, Issue
Abstract
Age-hardening provides one of the most widely used mechanisms for the strengthening of aluminum alloys. The age-hardening involves three steps: solution treatment, quenching and aging. The temperature of solution treatment and aging is very important in order to reach desired properties of castings. The optimum temperature of solution treatment and aging led to formation microstructural features in form which does not lead to decreasing properties, but increasing ones. The major microstructural features in A 226 cast alloys which are responsible for increasing properties are: eutectic Si particles, Cu-rich phases, Fe-rich phases and porosity. The increase of properties depends on morphology, size and volume of microstructural features. In order to assess age-hardening influence on microstructural features in A226 cast alloys were used as possibilities of evaluation by means of image analysis. Quantitative analysis decelerate changes in microstructure includes the spheroidization and coarsening of eutectic silicon, gradual disintegration, shortening and thinning of Fe-rich intermetallic phases, the dissolution of precipitates and the precipitation of finer hardening phase (Al2Cu) further increase in the hardness and tensile strength in the alloy. Changes of mechanical properties were measured in line with STN EN ISO.
Authors and Affiliations
Lenka Kuchariková, Eva Tillová
Keywords
Related Articles
- EP ID EP269059
- DOI 10.30657/pea.2017.17.01
- Views 55
- Downloads 0
Intermodal transport as an integral part of logistics system
The experience of companies that are successful in the carriage of goods prove that intermodal transport is now a major factor in determining the success of logistics system. A modern approach to the transport is based o...
BARRIERS AND OPPORTUNITIES IN THE IMPLEMENTATION OF LEAN MANUFACTURING IN THE CERAMIC INDUSTRY
The concept of lean management in an organization, improving products and processes using the Lean Manufacturing concept, is discussed in this paper. Striving for excellence is the key factor in maintain-ing competitiven...
Rapid prototyping in medical sciences
Even if it sound a bit incredible rapid prototyping (RPT) as production method has been used for decades in other professions. Nevertheless medical science just started discover the possibilities of this technology and u...
Change of internal friction on aluminium alloy EN AC 51200 depending on temperature
The article is focused on the analysis of changes in the dependence on temperature on the aluminium alloy EN AC 51200 (10,1% Mg, 1,32% Si and 0,43% Mn) by internal friction. Internal friction is a property of the materia...
Technical aspects of casting and their effect on the quality of Remanium CSe dental alloys
The study concerns on investigation of Remanium CSE alloy, one of the dental alloys used in metal-ceramic connection preparation. The alloys based on Ni-Cr-Mo are widely used in dental engineering because of their high m...