کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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271093 | 504988 | 2014 | 7 صفحه PDF | دانلود رایگان |

MGH956, a kind of oxide dispersion strengthened (ODS) alloy, which is considered as candidate structural material for advanced nuclear systems because of its excellent radiation resistance and high-temperature capability. However, pores in fusion welding joints seriously reduced the quality and performance of the joint and structure. Arc-ultrasonic technology was applied in this research in order to prevent pores and improve tensile strength. The results showed that the excitation current of arc-ultrasonic has great effect on the pores distribution and tensile property. When it is increased to 20 A or 30 A, few pores are in the joint and the tensile strength (about 550 MPa) is also improved. When the arc-ultrasonic frequency decreased from 60 kHz to 30 kHz, bubbles floated outside more easily, the tensile strength is increased to about 543 MPa. But arc-ultrasonic has little influence on weld joints microhardness change.
Journal: Fusion Engineering and Design - Volume 89, Issue 12, December 2014, Pages 2964–2970