Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1576513 | Materials Science and Engineering: A | 2013 | 9 Pages |
Abstract
In this study, the small punch test (SPT) was conducted to evaluate the stress corrosion cracking (SCC) susceptibility of stainless steel (SS) 304L with surface nanocrystallization (SNC) in 1Â mol/L NaCl+0.5Â mol/L HCl aq. The surface mechanical attrition treatment (SMAT) was applied to realize the SNC. The mechanical property and micro-structural evolutions of SS 304L induced by SMAT were investigated through optical microscope (OM), X-ray diffraction (XRD), micro-Vickers hardness and transmission electron microscopy (TEM). The grain size on the surface of the material was reduced to 30-100Â nm. The SPT was conducted in both ambient air and corrosive solution. The results were investigated by OM and scanning electron microscopy (SEM), showing that in ambient air, the specimen with 30Â min SMAT performed a higher yield strength and lower ductility than the solution annealed (SA) counterpart. The SS 304L without SMAT presented a transgranular SCC (TGSCC) mode in chloride solution. In contrast, the SNC 304L SS showed a higher SCC susceptibility with a typical intergranular SCC (IGSCC).
Keywords
ASsLaser-shock peeningIGSCCSMATStainless steel 304LSurface mechanical grinding treatmentFine particle peeningSMGTLSPUIPSSRTSPTSNCFPPFCCSCCAcoustic emissionSmall punch testHICTemIntergranular stress corrosion crackingHydrogen-induced crackingSlow strain rate testStress corrosion crackingSurface mechanical attrition treatmentHEEAustenitic stainless steelStainless steelSEMface-centered cubicScanning electron microscopyTransmission electron microscopyOptical microscopeSurface nanocrystallizationHydrogen environment embrittlementUltrasonic impact peeningX-ray diffractionXRDCold work
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Tao Bai, Peng Chen, Kaishu Guan,