scholarly journals Effect of Grain Size on Plastic Strain Analysis by EBSD for Austenitic Stainless Steels with Tensile Strain at 650°C

2012 ◽  
Vol 61 (4) ◽  
pp. 371-376 ◽  
Author(s):  
Kyohei NOMURA ◽  
Keiji KUBUSHIRO ◽  
Yohei SAKAKIBARA ◽  
Satoshi TAKAHASHI ◽  
Hiroki YOSHIZAWA
Keyword(s):  
Grain Size ◽  
Plastic Strain ◽  
Stainless Steels ◽  
Tensile Strain ◽  
Strain Analysis ◽  
Austenitic Stainless Steels

Influence of Grain Size on Recrystallisation During hot Working of Austenitic Stainless Steels

1999 ◽  
Vol 578 ◽  
Author(s):  
J. A. Whiteman ◽  
Y. Choi ◽  
C.M. Sellars
Keyword(s):  
Grain Size ◽  
Stainless Steels ◽  
Experimental Studies ◽  
Austenitic Stainless Steels ◽  
Hot Working ◽  
Nucleation Density ◽  
Empirical Relationships ◽  
Physically Based Model ◽  
Grain Sizes ◽  
Physically Based

AbstractDuring the hot rolling of austenitic stainless steels, complete static recrystallisation is expected between passes unless finishing temperatures are low. Typically progressive refinement takes place to grain sizes in the range 20–50μm. However, most experimental studies of the effect of strain, strain rate, temperature and initial grain size on recrystallisation kinetics and recrystallised grain size under hot working conditions have been carried out on initial grain sizes greater than 50μm. Empirical relationships from these data and from more limited results of CMn steels have been extrapolated to smaller grain sizes for use in models of microstructural evolution during rolling.Recent development of a physically based model for the effects of initial grain size, assuming that site saturated nucleation occurs at grain corners, grain edges, grain faces and at intragranular sites leads to interdependence of the effects of strain and grain sizeon nucleation density and hence on recrystallised grain size and recrystallisation rate. Experimental evidence available in the literature and some new results on finer grained Type 316 stainless steel are reviewed and compared with the expectations from the model.

Grain Growth Control in Grain Boundary Engineered Microstructures

2012 ◽  
Vol 715-716 ◽  
pp. 103-108 ◽  
Author(s):  
Valerie Randle ◽  
Mark Coleman
Keyword(s):  
Grain Size ◽  
Grain Boundary ◽  
Stainless Steels ◽  
Growth Control ◽  
Austenitic Stainless Steels ◽  
Grain Boundary Engineering ◽  
Size Measurement ◽  
Annealing Twins ◽  
And Control ◽  
Measurement And Control

Grain boundary engineering (GBE) to promote degradation-resistant interfaces in the microstructure usually requires that the grain size remains small so that strength is not compromised. Aspects of grain size measurement and control will be reviewed and discussed for a variety of GBE materials such as copper, nickel, nickel-based alloys and austenitic stainless steels, particularly in the light of the high proportion of annealing twins that constitute the GBE microstructure.

Review of Several Studies on High Temperature Oxidation Behaviour and Mechanism of Austenitic Stainless Steels

2011 ◽  
Vol 312-315 ◽  
pp. 1097-1105
Author(s):  
Hisao Fujikawa
Keyword(s):  
Grain Size ◽  
High Temperature ◽  
Oxide Scale ◽  
Oxidation Resistance ◽  
Stainless Steels ◽  
High Temperature Oxidation ◽  
Austenitic Stainless Steels ◽  
Oxidation Behaviour ◽  
Oxide Interface ◽  
Temperature Oxidation

Three studies on the oxidation behaviour of austenitic stainless steels were described in the present paper. (1) High temperature oxidation behaviour and its mechanism in austenitic stainless steels with high silicon: Sulfur contained as impurity in steel showed a harmful influence to the oxidation resistance of 19Cr-13Ni-3.5Si stainless steels. It was found that the abnormal oxidation was caused from the surroundings of MnS inclusions. (2) Effect of a small addition of yttrium on high temperature oxidation resistance of Si-containing austenitic stain less steels: The oxidation resistance of 19Cr-10Ni-1.5Si steels was improved remarkably even with only 0.01%Y addition, which is the same concentration as added for de-oxygenation. Y was enriched at the grain boundary of oxide scale and metal-oxide interface. It was suggested that Y-containing steels shoed good oxidation resistance, because the enriched Y at the grain boundary and metal-oxide interface prevented the diffusion of iron and oxygen ions through the oxide scale. (3) Effect of grain size on the oxidation behaviour of austenitic stainless steels: Type 304, 316 and 310 steels with finer grain size showed better oxidation resistance than those with coarser grain size at 850°C. The oxide scale of steels with coarser grain size easily spalled during the cooling process.

Characterization of the effects of hydrostatic extrusion on grain size, surface composition and the corrosion resistance of austenitic stainless steels

2008 ◽  
Vol 59 (9) ◽  
pp. 1292-1300 ◽  
Author(s):  
Marcin Pisarek ◽  
Piotr Kędzierzawski ◽  
Tomasz Płociński ◽  
Maria Janik-Czachor ◽  
Krzysztof J. Kurzydłowski
Keyword(s):  
Grain Size ◽  
Corrosion Resistance ◽  
Stainless Steels ◽  
Surface Composition ◽  
Austenitic Stainless Steels ◽  
Hydrostatic Extrusion

Measurement of Crystal Grain Size of Austenitic Stainless Steels under Low-Cycle Fatigue by EBSD Techniques

2010 ◽  
Vol 452-453 ◽  
pp. 809-812
Author(s):  
Takayuki Mori ◽  
Teruaki Yamada ◽  
Masatoshi Kuroda ◽  
Masayuki Kamaya
Keyword(s):  
Grain Size ◽  
Fatigue Damage ◽  
Stainless Steels ◽  
Electron Backscatter Diffraction ◽  
Low Cycle Fatigue ◽  
Austenitic Stainless Steels ◽  
Strain Range ◽  
Total Strain Range ◽  
Number Of Cycles ◽  
Backscatter Diffraction

Electron backscatter diffraction (EBSD) in conjunction with scanning electron microscopy was used to assess the fatigue damage induced in stainless steels. The parameter of the crystal grain size was devised in order to evaluate the fatigue damage in terms of the crystal grain size. It was concluded that the fatigue damage could be evaluated by the EBSD measurements using the relationship between the total strain range, the number of cycles and the crystal grain size.

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