Temper embrittlement of supermartensitic stainless steel and non-destructive inspection by magnetic Barkhausen noise

被引：21
作者：
Tavares, S. S. M. [1 ,2 ]
Noris, L. F. [3 ]
Pardal, J. M. [2 ,3 ]
da Silva, M. R. [4 ]
机构：
[1] Univ Fed Fluminense, Escola Engn, Rua Passo Patria 156, BR-24210240 Niteroi, RJ, Brazil
[2] Ctr Fed Educ Tecnol Celso Suckow Fonseca, Programa Posgrad Engn Mecan & Tecnol Mat, Rio De Janeiro, Brazil
[3] Univ Fed Fluminense, Programa Pos Grad Engn Mecan PGMEC, Niteroi, RJ, Brazil
[4] Univ Fed Itajuba, Inst Ciencias, Itajuba, Brazil
来源：
ENGINEERING FAILURE ANALYSIS | 2019年 / 100卷
关键词：
Magnetic Barkhausen Noise; Supermartensitic steel; Temper embrittlement; MICROSTRUCTURE; SENSITIZATION; TOUGHNESS; AUSTENITE; BEHAVIOR;
D O I：
10.1016/j.engfailanal.2019.02.034
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Supermartensitic is a new class of stainless steels used as seamless pipes and forged parts in the oil and gas off shore production. The final mechanical properties of the steel are adjusted by quenching and tempering heat treatments. In this work, a Ti alloyed supermartensitic stainless steel was quenched and tempered at 500 degrees C, 570 degrees C, 620 degrees C and 640 degrees C. Specimens tempered at 500 degrees C showed very low toughness and brittle fracture in low temperature Charpy tests. This temper embrittlement effect was detected by magnetic Barkhausen noise (MBN) inspection. Specimens tempered at 620 degrees C and 640 degrees C were cooled in water or in furnace after tempering, and those slowly cooled had lower toughness and higher austenite volume fraction. In this case, MBN could not detect the embrittlement effect, probably due to the high austenite (paramagnetic phase) content.
引用
收藏
页码：322 / 328
页数：7
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