Thermal aging of cast duplex stainless steels

Book · Tue Oct 31 23:00:00 EST 1995

OSTI ID:122565

Tanaka, T ^[1]; Kawaguchi, S; Sakamoto, N ^[2]; Koyama, K ^[3]

---

1. Kansai Electric Power Co. Inc., Osaka (Japan). General Office of Nuclear and Fossil Power
2. Mitsubishi Heavy Industries Ltd., Takasago (Japan)
3. Mitsubishi Heavy Industries Ltd., Kobe (Japan)

Cast duplex stainless steels of CR8M and CF8 are used in major components because of their superior characteristics, such as corrosion resistance, weldability and so on. But, these stainless steels are known to have tendency of thermal aging embrittlement after long term service. Therefore, mechanical properties have been investigated using Charpy impact specimens and fracture toughness specimens aged at 300{approximately}400 C up to 40,000 hours. As the results, effects of thermal aging on mechanical properties of these stainless steels were identified and a good relationship between Charpy impact energy and fracture toughness was obtained. In addition, prediction method for Charpy absorbed energy and fracture toughness was established.

• OSTI ID: 122565
• Report Number(s): CONF-950740--; ISBN 0-7918-1349-5
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
36 MATERIALS SCIENCE
AGING
CHROMIUM-NICKEL-MOLYBDENUM STEELS
EMBRITTLEMENT
EXPERIMENTAL DATA
FRACTURE PROPERTIES
MECHANICAL PROPERTIES
MECHANICAL TESTS
PWR TYPE REACTORS
REACTOR MATERIALS