Straightening and its influence on the final mechanical properties in cold worked stainless steel
2012 (Engelska)Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hp
Studentuppsats (Examensarbete)Alternativ titel
Riktning och dess påverkan på de mekaniska egenskaperna vid leveranstillstånd av kallbearbetat rostfritt stål (Svenska)
Abstract [en]
The main purpose with this investigation was to clarify when or if specific grades will soften or harden during the straightening process in a seven roll cross roll straightening machine. The aim was solely made to include tubes which had been cold worked to achieve high yield strength levels.
The straightening process will induce lengthwise tensile and compressive stress and strain. According to theory straightening could therefore also induce considerable Bauschinger effect.
Physical tests, with material from pilgered tubes, in a laboratory environment were performed to give a well-defined set up of the strain levels and sign of the same. Real in process trials were also performed. Parallel to the physical laboratory tests and the real process tests a FEM-simulation and a FEM-model to calculate strain levels was developed.
Two material types were investigated, but the results are only unambiguous for material A. Further investigations need to be done on material B to give a clear picture.
Ort, förlag, år, upplaga, sidor
2012. , s. 93
Nyckelord [en]
straightening, Bauschinger effect
Nationell ämneskategori
Annan materialteknik
Identifikatorer
URN: urn:nbn:se:kth:diva-103253ISRN: KTH/MSE--11/42--SE+CER/EXOAI: oai:DiVA.org:kth-103253DiVA, id: diva2:559296
Ämne / kurs
Bearbetningsteknik
Utbildningsprogram
Civilingenjörsexamen - Materialdesign
Presentation
2011-11-02, Klassrum i Högskolan Dalarnas huvudbyggnad, 11:30 (Engelska)
Uppsök
teknik
Handledare
Examinatorer
2012-10-092012-10-082022-06-24Bibliografiskt granskad