Time-dependent fracture of type 316L(N) steel at ambient temperature

2005 ◽  
Vol 28 (7) ◽  
pp. 641-652 ◽  
Author(s):  
P. J. BUDDEN ◽  
G. WARDLE ◽  
R. P. BIRKETT
Keyword(s):  
Ambient Temperature ◽  
Time Dependent ◽  
Type 316L

scholarly journals Time-dependent line-of-sight extinction tomography for multi-hole GDI injectors

2016 ◽  
Vol 9 (3) ◽  
pp. 199-211 ◽  
Author(s):  
Yudaya Sivathanu ◽  
Jongmook Lim ◽  
Varun Kulkarni
Keyword(s):  
Ambient Temperature ◽  
Direct Injection ◽  
Injection Pressure ◽  
Gasoline Direct Injection ◽  
Time Dependent ◽  
Line Of Sight ◽  
Experimental Measurements ◽  
Fuel Injectors ◽  
Factors Affecting ◽  
Spray Structure

Finely atomized sprays from multi-hole gasoline direct injection (GDI) fuel injectors make them an ideal choice for automobile applications. A knowledge of the factors affecting the performance of these injectors is hence important. In the study presented here, we employ statistical extinction tomography to examine the transient characteristics of two GDI fuel injectors with five and six holes. Two axial locations, 25 mm and 35 mm from the injector exit, are chosen for experimental measurements, and the dependence of injection pressure and ambient temperature on plume locations and angles is examined from these measurements. A pressure chamber with opposing windows is used which permits the nozzle to be rotated 12 times (30° each rotation) to obtain information on the complete spray structure. Additionally, the plume centroid locations are measured and compared with those obtained with a mechanical patternator. The centroid locations from the two instruments compare favorably.

Time-dependent loss of radioimmunoassayable levels of progesterone following ambient temperature incubation of heparinized bovine blood

1980 ◽  
Vol 13 (4) ◽  
pp. 305-309 ◽  
Author(s):  
R.E. Owens ◽  
D.T. Atkins ◽  
C.H. Rahe ◽  
J.L. Fleeger ◽  
P.G. Harms
Keyword(s):  
Ambient Temperature ◽  
Time Dependent ◽  
Bovine Blood

Viscoplastic Behavior and Modelization of an Austenitic Stainless Steel (17-12 SPH) at High Temperature (T = 600°C), Under In and Out of Phase Cyclic Tension-Torsion Loading

1993 ◽  
Vol 115 (1) ◽  
pp. 68-76 ◽  
Author(s):  
P. Delobelle ◽  
R. Lachat
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Austenitic Stainless Steel ◽  
Ambient Temperature ◽  
Maximum Amplitude ◽  
Viscoplastic Model ◽  
Cyclic Tension ◽  
Type 316L ◽  
Strain Components ◽  
Correct Representation

The results of experiments performed on an austenitic stainless steel of the type 316L at a temperature of 600°C are presented. The tests were made under both unidirectional (1D) and bidimensional (2D) cyclic tension-torsion loading, both in and out of phase with one (case of 2D ratchet) or two cyclic components. For the 2D loadings, it is shown that a weak supplementary hardening ΔH+ appears which is mostly a function of the degree of phase difference φ between the strain components and the ratio R between the maximum amplitudes of these components. These observations conform qualitatively to those already reported for ambient temperature but quantitatively it is shown that the maximum amplitude of this supplementary hardening is a strongly decreasing function of the temperature. A simple phenomenological formulation is proposed which, when integrated into a unified viscoplastic model developed elsewhere, leads to a correct representation of the experimental results.

scholarly journals Hydrogen Effects on Fracture Toughness of Type 316L Stainless Steel From 175 K to 425 K

2009 ◽  
Author(s):  
Michael J. Morgan ◽  
Glenn K. Chapman
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Ambient Temperature ◽  
Crack Extension ◽  
316L Stainless Steel ◽  
J Integral ◽  
Martensite Formation ◽  
Type 316L ◽  
Strain Induced Martensite ◽  
Type 316L Stainless Steel

The effects of hydrogen on the fracture-toughness properties of Type 316L stainless steel from 175 K to 425 K were measured. Fracture-toughness samples were fabricated from Type 316L stainless steel forgings and hydrogen-charged with hydrogen at 34 MPa and 623 K for two weeks prior to testing. The effect of hydrogen on the J-Integral vs. crack extension behavior was measured at various temperatures by fracturing non-charged and hydrogen-charged samples in an environmental chamber. Hydrogen-charged steels had lower toughness values than non-charged ones, but still retained good toughness properties. The fracture-toughness values of hydrogen-charged samples tested near ambient temperature were about 70% of non-charged values. For hydrogen-charged samples tested at 225 K and 425 K, the fracture-toughness values were 50% of the non-charged values. In all cases, fracture occurred by microvoid nucleation and coalescence, although the hydrogen-charged samples had smaller and more closely spaced microvoids. The results suggest that hydrogen effects on toughness are greater at 225 K than they are at ambient temperature because of strain-induced martensite formation. At 425 K, the hydrogen effects on toughness are greater than they are at ambient temperature because of the higher mobility of hydrogen.

High temperature time-dependent low cycle fatigue behaviour of a type 316L(N) stainless steel

1999 ◽  
Vol 21 (1) ◽  
pp. 11-21 ◽  
Author(s):  
V.S Srinivasan ◽  
M Valsan ◽  
R Sandhya ◽  
K Bhanu Sankara Rao ◽  
S.L Mannan ◽  
...  
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Low Cycle Fatigue ◽  
Fatigue Behaviour ◽  
Time Dependent ◽  
Cycle Fatigue ◽  
Type 316L ◽  
Temperature Time

Time-dependent twinning during ambient temperature compression creep of alpha Ti-0.4Mn alloy

1999 ◽  
Vol 30 (6) ◽  
pp. 1675-1679 ◽  
Author(s):  
Carl A. Hultgren ◽  
Sreeramaurthy Ankem ◽  
Charles A. Greene
Keyword(s):  
Ambient Temperature ◽  
Time Dependent ◽  
Compression Creep

scholarly journals Hydrogen Effects on the Fracture Toughness Properties of Forged Stainless Steels

2008 ◽  
Author(s):  
Michael J. Morgan
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Ambient Temperature ◽  
Stainless Steels ◽  
316L Stainless Steel ◽  
Hydrogen Gas ◽  
Hydrogen Degradation ◽  
Type 316L ◽  
Fracture Appearance ◽  
Type 316L Stainless Steel

The effect of hydrogen on the fracture toughness properties of Types 304L, 316L and 21-6-9 forged stainless steels was investigated. Fracture toughness samples were fabricated from forward-extruded forgings. Samples were uniformly saturated with hydrogen after exposure to hydrogen gas at 34 MPa or 69 MPa and 623 K prior to testing. The fracture toughness properties were characterized by measuring the J-R behavior at ambient temperature in air. The results show that the hydrogen-charged steels have fracture toughness values that were about 50–60% of the values measured for the unexposed steels. The reduction in fracture toughness was accompanied by a change in fracture appearance. Both uncharged and hydrogen-charged samples failed by microvoid nucleation and coalescence, but the fracture surfaces of the hydrogen-charged steels had smaller microvoids. Type 316L stainless steel had the highest fracture toughness properties and the greatest resistance to hydrogen degradation.

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