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Title:Vpliv oslabitve in ojačitve natezno obremenjene komponente iz materiala AISI 316L na nastanek in rast razpok : diplomsko delo
Authors:ID Bračko, Brin (Author)
ID Gubeljak, Nenad (Mentor) More about this mentor... New window
ID Jerenec, Filip (Comentor)
Files:.pdf VS_Bracko_Brin_2023.pdf (4,35 MB)
MD5: 3649CA277DDB15067F228F32685ED197
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract:V tem diplomskem delu je predstavljeno podjetje metalna IMPRO, znotraj katerega sem pridobil navdih za mojo diplomsko nalogo. V podjetju se za izdelavo tlačnih in reaktorskih posod uporablja material AISI 316L, ki ima izredno visok indeks deformacijskega utrjevanja, saj med napetostnim obremenjevanjem pride do transformacije metastabilnega avstenita v martenzit. Namen diplomskega dela je ugotoviti vpliv trdnostno utrjenih področij z lokalno plastično deformacijo, kot tudi vpliv oslabitve na smer in propagacijo utrujenostne razpoke. Vpliv smo ugotavljali z laboratorijskim testiranjem vzorcev s standardno geometrijo. Natančno je opisana tudi izdelava preizkušancev, sam postopek testiranja na servo-hidravličnem stroju Instron 1255, odčitavanje in beleženje podatkov ter delo v programu Microsoft Excel. Rezultati kažejo, da lokalno utrjena področja pri tankih epruvetah ne zavirajo inciacijo in rast utrujenostne razpoke, prav tako tudi pri tankih epruvetah ne pride do spremembe smeri napredovanja utrujenostne razpoke. Pri deblejših epruvetah pride do zaviranja rasti utrujenostne razpoke skozi lokalno utrjena področja, vendar istočasno pride do spremembe rasti razpoke proti luknji, ki predstavlja območje oslabitev na kompaktnem (ang. Compact Tension-CT) preizkušancu.
Keywords:kontrola, merilno orodje, Instron, natezno preizkušanje, tlačna obremenitev, preizkušanje, epruvete, utrujanje, razpoka
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[B. Bračko]
Year of publishing:2023
Number of pages:1 spletni vir (1 datoteka PDF (VIII, 38 f.))
PID:20.500.12556/DKUM-85808 New window
UDC:539.3:620.1(043.2)
COBISS.SI-ID:187630339 New window
Publication date in DKUM:09.10.2023
Views:492
Downloads:57
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
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Licences

License:CC BY-ND 4.0, Creative Commons Attribution-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nd/4.0/
Description:Under the NoDerivatives Creative Commons license one can take a work released under this license and re-distribute it, but it cannot be shared with others in adapted form, and credit must be provided to the author.
Licensing start date:12.09.2023

Secondary language

Language:English
Title:The influence of weakening and strengthening of a tensile component made of aisi 316l material on the formation and growth of cracks
Abstract:In this diploma work, the company metalna IMPRO is presented, within which I gained inspiration for my diploma thesis. The company uses AISI 316L material for the production of pressure and reactor vessels, which has an extremely high strain hardening index, as metastable austenite transforms into martensite during stress loading. The purpose of the thesis is to determine the influence of strength-strengthened areas from local plastic deformation, as well as the influence of weakening on the direction and propagation of a fatigue crack. The impact was determined by laboratory testing of samples with standard geometry. The production of test specimens, the actual testing process on the Instron 1255 servo-hydraulic machine, the reading and recording of data, and the work in the Microsoft Excel program are also described in detail. The results show that the locally hardened areas in thin tubes do not inhibit fatigue crack initiation and growth, and in thin tubes there is no change in the direction of fatigue crack progression. In the case of thicker test tubes, fatigue crack growth through locally strengthened areas is inhibited, but at the same time there is a change in crack growth towards the hole, which represents the area of weakening on the compact (Compact Tension-CT) specimen.
Keywords:control, measuring tool, Instron, tensile testing, compressive load, testing, test tubes, fatigue, crack


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