| Autor: |
Mulyana, Cukup, Saad, Aswad Hi, Kartawidjaja, Mariah, Henboral, Agtri |
| Zdroj: |
Materials Science Forum; August 2015, Vol. 827 Issue: 1 p366-370, 5p |
| Abstrakt: |
Critical component of boiler that frequently experiencing failure is on the junction of boiler tube consist of two different materials. This failure mechanism would lead to tube rupture and would be followed by power plant shutdown. Failure analysis has been conducted on dissimilar metal weld (DMW) of Ferritic SA-213 T22 welded with Austenitic SA-213 TP 304H. This tube is used in Suralaya Steam Power Plant. Operating temperature and pressure of the steam inside the tube in normal condition are respectively 196.8kg/cm2 and 540 °C.In order to understand the real cause of failure several tests are ran, which are chemical composition test, micro vickers, and metallographic test on based metal, heat effective zone, and filler area. The tests are conducted in a layered manner to clearly understand the cause of the failure. Causes of the failure are due to the contribution of carbon diffusion and disparity of expansion coefficient of two materials. |
| Databáze: |
Supplemental Index |
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