Experimental microalloyed steel subjected to tempering heat treatments and its effect on hydrogen embrittlement
The influence of both, time and annealing temperature over the susceptibility to hydrogen embrittlement was evaluated in experimental microalloyed steel. Tempering heat treatments were carried out in a temperature range of 200-600 °C with several heat treatment times. They were hydrogen charged cath...
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| Other Authors: | , , , |
| Format: | article |
| Language: | Spanish |
| Published: |
2016
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| Subjects: | |
| Online Access: | http://revistas.utp.ac.pa/index.php/id-tecnologico/article/view/590 http://ridda2.utp.ac.pa/handle/123456789/1806 |
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| Summary: | The influence of both, time and annealing temperature over the susceptibility to hydrogen embrittlement was evaluated in experimental microalloyed steel. Tempering heat treatments were carried out in a temperature range of 200-600 °C with several heat treatment times. They were hydrogen charged cathodically in a solution of H2SO4, using a current density of 40 mA/cm² during 1 and 12 hours of exposure. Susceptibility to hydrogen embrittlement and its effect on the mechanical properties in different treatment conditions were evaluated by tensile test. Also, were conducted hydrogen permeability tests to determine effective diffusion coefficients (Deff). The results showed that the mechanical properties decrease in ultimate tensile strength (UTS) and yield stress (YS) values as function of charging cathodic hydrogen times, without a clear trend over time and temperature heat treatment. |
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