EVOLUTION OF CARBIDE PRECIPITATES IN 2.25CR-1MO STEEL WITH LONG-TERM SERVICE AGING IN SUPERCRITICAL WATER
Carbide evolution can greatly affect the fracture toughness and stress corrosion cracking resistance of materials, which is important for the life extension and avoidance of catastrophic failure of power plant components. In the present work, carbide evolution in 2.25Cr-1MO steel after long-term service aging was investigated. Boiler pipe samples were removed from a supercritical water-cooled coal plant with different service times up to 28 years and temperature of 537℃. The carbide precipitation and coarsening was studied using carbon extraction replica samples and analyzed with transmission electron microscopy and energy dispersive X-ray spectroscopy. The carbide precipitation obtained using bulk electrolytic extraction was analyzed using X-ray diffraction for studying the carbide transformation in the long-term service. Additionally the stability of the substructure of the proeutectoid ferrite was examined with scanning electron microscopy.
Yang,Y. Certain, A. Sridharan, K. Allen, T. R.
University of Wisconsin-Madison, WI, USA 53706
国际会议
上海
英文
266-272
2007-03-12（万方平台首次上网日期，不代表论文的发表时间）