Impact of Rare Earth Addition on Creep Rupture Behavior of 316LN Austenitic Stainless Steel at 700°C
收藏中国科学院兰州化学物理研究所科学数据中心2023-05-22 更新2024-04-26 收录
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资源简介：
Effect of rare earth (RE) on creep rupture behavior of 316LN austenitic stainless steel
(316LN steel) was investigated after crept at 700℃ under the stress in the range from 125MPa to
200MPa, by the optical microscopy (OM), scanning electron microscopy (SEM) and electron
backscatter diffraction (EBSD). The results show RE addition in 316LN steel increased the creep
rupture ductility at high stress, but reduced the creep rupture ductility at low stress. Under 200MPa,
RE addition increased the creep rupture strain of 316LN steel from 0.558 to 0.787 but the creep
rupture strain after crept under 150MPa was decreased from 0.875 to 0.566. The fracture mode of
316LN steel was also apparently impacted by the RE addition. The typical ductile fracture feature of
homogeneous dense dimples was obviously observed in NRE steel after crept rupture under all
stresses. While in 32RE steel, small amount of intergranular fracture fractographs under low stress
appeared instead of partial dimples under high stress. Moreover, it is noted that RE addition in 316LN
steel promotes to precipitate a great number of fine Laves particles within grains.
提供机构：
中国科学院兰州化学物理研究所科学数据中心
创建时间：
2023-05-22
