Creep cavitation in type 321 stainless steel

✍ Scribed by O.R. Arzate; L. Martinez

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 488 KB
• Volume: 101
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/0921-5093(88)90043-3

✦ Synopsis

7he nucleation and growth of intergranular cavities during the creep of type 321 stainless steel were investigated. ('reel) samples were solution heat treated at lll2°C for 7.2 ks and then subjected to a stabilization treatment of 288 ks at 910°C. A clean microstructure was obtained with only a few coarse prima O, precipitates. I'bur samples were then deformed in creep at 49.6 MPa and 812°C for 83.5, 135, 163 and 238 ks. After a careful sample preparation procedure, a large number of cavities were measured in each sample. The cavi~ size distributions in the samples were obtained. The rate of nucleation of cavities was found to be approximately proportional to time in the interval studied. The cavity growth rate as a function of the cavity size was calculated using the cavity size distributions and wets compared with theoretical models.