Microstructure and Mechanical Properties of 21-6-9 Stainless Steel Electron Beam Welds
| Autor: | I Golosker, John W. Elmer, J.N. Florando, Rupalee P. Mulay, G. Fred Ellsworth |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Austenite
Materials science Structural material Metallurgy Metals and Alloys 02 engineering and technology Welding Nanoindentation 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure Indentation hardness 020501 mining & metallurgy law.invention 0205 materials engineering Mechanics of Materials law Ferrite (iron) Ultimate tensile strength Composite material 0210 nano-technology |
| Zdroj: | Metallurgical and Materials Transactions A. 48:1771-1787 |
| ISSN: | 1543-1940 1073-5623 |
| DOI: | 10.1007/s11661-017-3996-y |
| Popis: | Welds can either be stronger or weaker than the base metals that they join depending on the microstructures that form in the fusion and heat-affected zones of the weld. In this paper, weld strengthening in the fusion zone of annealed 21-6-9 stainless steel is investigated using cross-weld tensile samples, hardness testing, and microstructural characterization. Due to the stronger nature of the weld, the cross-weld tensile tests failed in the base metal and were not able to generate true fusion zone mechanical properties. Nanoindentation with a spherical indenter was instead used to predict the tensile behavior for the weld metal. Extrapolation of the nanoindentation results to higher strains was performed using the Steinberg–Guinan and Johnson–Cook strength models, and the results can be used for weld strength modeling purposes. The results illustrate how microstructural refinement and residual ferrite formation in the weld fusion zone can be an effective strengthener for 21-6-9 stainless steel. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink