Effect of LCF on behavior and microstructure of microalloyed HSLA steel and its simulated CGHAZ
| Autor: | Ivo Blačić, Srđan Bulatović, Tomaž Vuherer, Ljubica Milović, Vujadin Aleksić |
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| Rok vydání: | 2019 |
| Předmět: |
Simulated weld CGHAZ
Materials science Cyclic test General Engineering 020101 civil engineering Low-cycle fatigue 02 engineering and technology Plasticity Microstructure Dynamic load testing 0201 civil engineering 020303 mechanical engineering & transports High strength low-alloyed steels 0203 mechanical engineering Crack initiation Fatigue loading Fracture (geology) General Materials Science Composite material |
| Zdroj: | Engineering Failure Analysis |
| ISSN: | 1350-6307 |
| DOI: | 10.1016/j.engfailanal.2019.06.017 |
| Popis: | Numerous structural components made of high strength low-alloyed steels are often exposed to low-cycle fatigue loading during their exploitation life. In order to study the fatigue behavior of one grade of structural steels produced in Yugoslavia during the eighties of the last century, a push-pull constant amplitude strain-controlled fatigue tests were conducted at room temperatures. This paper analyses behavior of two different materials, parent steel (PM) and its coarse-grained (CG) simulated heat-affected zone (SHAZ) exposed to the action of low-cycle fatigue (LCF) loading performed in the range from 1 to 104 cycles. LCF tests were conducted at strain ratio R = -1 at strain amplitude range from 0.3% to 0.8%. The materials' Coffin-Manson parameters appearing in the strain-life and cyclic stress-strain curves were calculated. Fracture surface analysis of both materials was done. The results showed that plasticity under dynamic load conditions is satisfactory for both materials which give them good resistance to crack initiation and propagation. |
| Databáze: | OpenAIRE |
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