ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
High strength aluminium wrought alloys as well as powder metallurgical aluminiumalloys are limited regarding massive formability. The formability at room temperature can besignificantly affected by superimposing hydrostatic pressure. Depending on the process control, coldforming enables locally induced strain hardening effects, whereby increased hardness or hardnessgradients can be regulated. Simultaneously, the necessity of mechanical post processing is reducedby a metal forming fabrication of joint and connection elements at room temperature.By splitting the component in strengthened and not strengthened regions, specially adaptedproperty profiles can be adjusted to the application. Thus, specially load adapted components withlocally optimised property profiles e.g. ductile or high strength, brittle areas can be manufactured. Adefined buckling or folding of a component in case of a crash can thereby be achieved.In this project innovative tool principles for superimposed cold solid forming will be developed.They will be used to manufacture high strength and complex aluminium structure components withspecific adjustment of local strain hardening. A tool technique is to be created in order to generatelocally hardened areas within massive structures by metal forming. Furthermore, the task is todetermine the procedures limits for superimposed cold massive forming with specifically adjustedstrain hardening of aluminium alloys.For the realisation of these aims fundamental research has to be made, by which the coherencesbetween specific process parameters and the increased formability are determined. Furthermore, thecold hardening effects are to be adjusted by cold massive forming with superimposed hydrostaticpressure and displayed with the help of FEA.In the long term, the analysis aims at the development of pressure superimposed forming that istechnically utilisable as a near net shape manufacturing process for high complex aluminiumstructure components with selective adjustment of local properties
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.22.57.pdf
