Mehaničke osobine i brzina rasta zamorne prsline u zavarenom spoju pancirnog čelika
| Autor: | Čabrilo Aleksandar |
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| Jazyk: | srbština |
| Rok vydání: | 2018 |
| Předmět: | |
| Druh dokumentu: | Diplomová práce |
| Popis: | Cilj rada je bila izrada kvalitetnog zavarenog spoja pancirnog čelika.Zavareni spoj poseduje dobre zatezne karakteristike, kao i visoku energijuudara u metal šavu i ZUT-u, visoku otpornost na propagaciju prsline umetal šavu i ZUT-u. Osnovni materijal ima najveću zateznu čvrstoću,najnižu energiju udara, najmanju žilavost loma i otpornost na propagacijuprsline. Nakon balističkih ispitivanja ustanovljeno je da ZUT i osnovnimaterijal poseduju balističku otpornost, dok metal šava ne zadovoljavastandarde. Ispitivanjem gasne hromatografije ustanovljena je niskakoličina difundovanog i zadržanog vodonika u zoni metal šava. U skladusa tim se zaključuje da su parameteri zavarivanja, kao i dodatni materijalodgovarajuće izabrani. Na osnovu ispitivanja brzine rasta zamorneprsline, određen je preostali vek oklopnih vozila koja se prave odpancirnog čelika. The aim of this paper was to produce a high-quality welded joint of armored steel.The welded joint has good tensile properties, as well as a high impact energy inthe weld metal and HAZ, and high resistance to crack propagation in the weldmetal and HAZ. The base metal has the highest tensile strength, the lowestimpact energy and the smallest fracture toughness and crack propagationresistance. After ballistic testing, the HAZ and basic metals have been found tohave ballistic resistance, while the weld metal does not meet the standards. Gaschromatography analysis detected a low amount of diffused and retainedhydrogen in the metal seam zone. It may therefore be concluded that the weldingparameters and the additional material have been appropriately selected.Based on the study of the fatigue crack growth rate, the fatigue life of armoredvehicles was predicted. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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