Investigations of the mechanical properties and structure of laser welds for ITER divertor and first wall
| Autor: | S.A. Fabritsiev, A.A. Kazakov, D. Kiselev |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Mechanical Engineering Divertor Laser beam welding Welding Laser 01 natural sciences Indentation hardness 010305 fluids & plasmas law.invention Cracking Nuclear Energy and Engineering law 0103 physical sciences Fracture (geology) General Materials Science Composite material 010306 general physics Joint (geology) Civil and Structural Engineering |
| Zdroj: | Fusion Engineering and Design. 127:139-150 |
| ISSN: | 0920-3796 |
| Popis: | The paper analyzes the physical and mechanical properties of the material of a laser welded joint from 316L(N) steel. The testing methodology is proposed, which makes it possible to evaluate Rp0.2, Rm, uniform elongation, as well as to obtain the engineering stress-strain curve σeng − eeng and true stress-strain curve σtrue − etrue directly for the material of a thin laser weld. The weld material has been found to have a higher yield strength than the base metal, i.e. Rp0.2 = 344 MPa at RT. It is shown that the laser weld material is capable of withstanding without cracking the uniform elongation up to 45% and true stresses up to 850 MPa. The weld structure and the microhardness distribution in the base metal and in the weld have been investigated. Fracture of the laser weld material is of ductile transcrystalline character. The conclusion has been substantiated, that the proposed testing methodology provides engineers and designers of ITER high-heat flux components with more complete information on the properties of laser welds than the standard method. |
| Databáze: | OpenAIRE |
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