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Local Changes of Microhardness in Dissimilar Weld Joints after High Temperature Exposure Pavel Šohaj1,a and Vít Jan1,b 1Institute of Materials Science and Engineering, FME, Brno UT, Technická 2896/2, Brno 616 69, Czech Republic aPavelsohaj@seznam.cz, bjan@fme.vutbr.cz Keywords: microhardness, dissimilar weld, creep-resistant steel, redistribution Abstract.
The used materials must hold their mechanical and corrosion properties during service life of the component.
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The behaviors of both materials are quite different.
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The material used for the investigations corresponds to Q235A.
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Introduction Epoxy resins are thermoset polymers that are frequently used as a matrix for advanced composite materials.
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In addition, the results have certain significance on determining crack stability of the wedge-splitting specimen and studying the fracture characteristics of crack tip of the mass concrete materials and structures.
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It has been known that the permanent strain remained after phase transformation for iron and other alloys when the phase transformation proceeded under the external stress even lower than the yield stress of the materials [5].
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