ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
The RHEOMETALTM process is a commercially used semi-solid process for productionof high integrity cast components. The process differs from most other semi-solid casting processesin that temperature control is not necessary during processing and large amount of slurry withrequired solid fraction can be quickly produced. The simplicity of this process has led to a largecommercial interest during the last year.This work is based on an investigation regarding the variation of as-cast mechanical properties forsecondary Al-Si based alloys (~2.5 % Cu) with a Si content varying from 4.55 to 8.90 % using theRHEOMETALTM process. The purpose was to find the most suitable Al-Si alloy for rheocasting, incomparison with the common HPDC-alloy A380 (EN-AC46000). It was found that lower Sicontaining alloys exhibited better elongation but slightly lower yield strength. The alloy containing5.39 wt% Si showed the highest ultimate tensile strength in this investigation. The lower Sicontaining alloys also demonstrated better feedability in the rheocasting process, which is contraryto what normally is found for normal liquid casting processes. Based on the results in thisinvestigation it is recommended to use an alloy containing about 5-7 wt% Si for rheocastingpurposes
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.779.pdf
Permalink
