INFLUENCES OF MATERIAL AND PROCESS PARAMETERS ON DELAYED FRACTURE IN TRIP-AIDED AUSTENITIC STAINLESS STEELS

被引：0

作者：

Guo, Xiaofei ^{[1
]}

Bleck, Wolfgang ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Ferrous Met, D-52072 Aachen, Germany

来源：

TMS2011 SUPPLEMENTAL PROCEEDINGS, VOL 2: MATERIALS FABRICATION, PROPERTIES, CHARACTERIZATION, AND MODELING | 2011年

关键词：

TRIP-aided austenitic stainless steels; delayed fracture; hydrogen; STRAIN-RATE; HYDROGEN;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of material and process parameters on delayed fracture susceptibility of three AISI 301 steels have been studied by Slow Strain Rate Tests (SSRT) and Deep Drawing Tests (DDT). The parameterss of austenite stability, presence of prior martensite nuclei and hydrogen content have been evaluated through analyzing the tensile strength, ductility, time to fracture and fracture surface of hydrogen pre-charged SSRT and DDT specimens. Steels having prior martensite nuclei or more unstable austenite were found more sensitive to delayed fracture. Besides, the time to fracture declined with increasing diffusive hydrogen content in a power-law manner. In addition, delayed fracture in DDT specimens could be prohibited by raising the forming temperature and punch velocity, owning to the suppressed phase transformation and partial residual stress relief. Fractographic studies revealed the transition of fracture mode from ductile to quasi-cleavage/inter-granular fracture depending on hydrogen content and stress triaxility.

引用

页码：521 / 528

页数：8

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