高速炉燃料被覆管用316ステンレス鋼のクリープ特性におよぼす冷間加工度の影響
1973 年 59 巻 7 号 p. 949-954
詳細
1973 年 59 巻 7 号 p. 949-954
The effect of cold working on creep properties of 316 stainless steel used for a fuel cladding material in fast breeder reactor has been investigated. Specimens rolled by 0 to 30% were tested under various stresses, 4 to 15kg/mm2, at 650°C and 750°C.
It was observed that the 5% cold-rolled specimen showed the minimum creep rate under low stress at 650°C, however, the non-cold rolled specimen showed the lowest creep rate at 750°C. This could be explained by the creep strain which assisted the recovery of the previous strain due to cold working. The recovery observed by X-ray diffraction was a clear evidence of the above explanation, especially in the case of creep at 750°C.
