The Effect of Varying Degrees of Cold Work on the Stress-Rupture Properties of Type 304 Stainless Steel

1975 ◽  
Vol 97 (4) ◽  
pp. 305-312 ◽  
Author(s):  
M. Gold ◽  
W. E. Leyda ◽  
R. H. Zeisloft
Keyword(s):  
Tensile Properties ◽  
Cold Work ◽  
Stress Rupture ◽  
Austenitic Stainless Steels ◽  
Temperature Limit ◽  
Creep Rupture ◽  
304 Stainless Steel ◽  
Stress Rupture Properties ◽  
Few Data ◽  
Rupture Properties

Cold work enhances the room temperature tensile properties of austenitic stainless steels. There are few data on the effect of varying degrees of cold work on elevated temperature properties. Such information is needed to set design limits on the use of cold-work enhanced properties in the creep range. ASTM A-193 B8 bars were given three levels of cold work. Tensile properties, creep-rupture properties, and the resulting microstructures were determined and compared with those of annealed bar. There is a temperature limit, dependent on the degree of cold work, beyond which the enhancement of creep-rupture properties is not observed.

Increasing Strength of Gas Turbine Alloys by Cold Work Prior to Aging

1967 ◽  
Vol 89 (1) ◽  
pp. 61-66 ◽  
Author(s):  
F. M. Richmond
Keyword(s):  
Tensile Properties ◽  
Gas Turbine ◽  
Room Temperature ◽  
Precipitation Hardening ◽  
Cold Work ◽  
Stress Rupture ◽  
Combined Effect ◽  
Stress Rupture Properties ◽  
Cold Worked ◽  
Rupture Properties

The combined effect of cold work and precipitation hardening treatments on the room-temperature hardness and tensile properties of A-286, Waspaloy, and Unitemp® 212 has been investigated. Significant increases in these properties were found for all alloys. A brief study of the effect of the stress rupture properties of cold-worked and aged A-286 indicated no detrimental effects for the temperature and stress levels investigated.

IN-519

Alloy Digest ◽  
1970 ◽  
Vol 19 (11) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Stress Rupture ◽  
Heat Treating ◽  
Centrifugally Cast ◽  
Temperature Performance ◽  
Stress Rupture Properties ◽  
Rupture Properties

Abstract IN-519 was developed primarily for application as centrifugally cast tubes in steam-hydrocarbon reformer furnaces. It has significantly higher stress-rupture properties than HK-40 (25Cr-20Ni), which is most commonly used for such components. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep and fatigue. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: SS-246. Producer or source: Abex Corporation, Engineered Products Division.

The Creep-Rupture Properties of 80 Ni-20 Cr Alloys

1960 ◽  
Vol 82 (4) ◽  
pp. 829-838 ◽  
Author(s):  
Robert Widmer ◽  
Nicholas J. Grant
Keyword(s):  
Creep Curve ◽  
Creep Behavior ◽  
Stress Rupture ◽  
Creep Rupture ◽  
Stress Range ◽  
Minor Constituents ◽  
Stress Rupture Properties ◽  
Third Stage ◽  
Rupture Properties

The creep-rupture properties and the creep behavior of a series of 80 Ni-20 Cr alloys were investigated over the 1200 to 1800-F range. In the group were two vacuum-melted and three air-melted alloys. Among these five heats there were small but important differences in minor constituents such as silicon, manganese, sulfur, and possible tramp elements, primarily as a result of the melting practice in each case. Of particular interest in this study was the variation in ductility which the various alloys exhibited in creep-rupture tests which lasted from a few minutes to more than 1000 hr. A close examination of ductility behavior was undertaken by breaking down the creep curve into primary, secondary, and third-stage creep as a function of stress and temperature. It is shown that the stress-rupture properties are not affected over a wide temperature and stress range by a change in minor constituents, whereas the ductility behavior can vary considerably.

Towards quantitative analysis of nanometer-sized helium bubbles in irradiated steels using parallel-detection EELS in a STEM

1990 ◽  
Vol 48 (4) ◽  
pp. 180-181
Author(s):  
A. J. McGibbon ◽  
L. M. Brown
Keyword(s):  
Stress Rupture ◽  
Austenitic Stainless Steels ◽  
Scanning Transmission Electron Microscope ◽  
Nuclear Industry ◽  
Helium Bubbles ◽  
Parallel Detection ◽  
Transmission Electron ◽  
Stress Rupture Properties ◽  
Scanning Transmission ◽  
Rupture Properties

The stress rupture properties of high nickel austenitic alloys and austenitic stainless steels used in the nuclear industry are strongly affected under irradiation by the formation of helium from boron by means of an n-α reaction. As the congregation and growth of helium bubbles (typically 20-50nm diameter) at grain boundaries can cause embrittlement in stressed steels, it is important to gain an understanding of embrittlement mechanisms in the material. Consequently, an accurate measurement of quantities such as bubble pressure and metal surface energy is highly desirable. However, this can only be achieved if the number of helium atoms per unit volume is known. In this work, we report on the use of parallel-detection electron energy loss spectroscopy (PEELS) on a VG HB501 scanning transmission electron microscope (STEM) as a powerful technique for characterising helium bubbles in irradiated steels. In addition, we suggest a simple analytical process that could be used to quantify the amount of helium present in each bubble.

MÄRKER G4859

Alloy Digest ◽  
1993 ◽  
Vol 42 (5) ◽  
Keyword(s):  
Physical Properties ◽  
Thermal Shock ◽  
Tensile Properties ◽  
Thermal Shock Resistance ◽  
Base Alloy ◽  
Stress Rupture ◽  
Iron Base Alloy ◽  
Stress Rupture Properties ◽  
Shock Resistance ◽  
Rupture Properties

Abstract Märker G4859 is a cast austenitic iron-base alloy with good additions of chromium and nickel to develop good stress-rupture properties with good thermal shock resistance. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on casting and joining. Filing Code: SS-543. Producer or source: Schmidt & Clemens GmbH.

Heat-to-Heat Variations in Creep-Rupture Properties of Annealed 2 1/4 Cr-1 Mo Steel

1983 ◽  
Vol 105 (4) ◽  
pp. 320-328
Author(s):  
R. L. Klueh
Keyword(s):  
Rupture Life ◽  
High Stress ◽  
Stress Rupture ◽  
Carbide Precipitation ◽  
Creep Rupture ◽  
Creep And Stress Rupture ◽  
Stress Rupture Properties ◽  
Data Scatter ◽  
Life Tests ◽  
Rupture Properties

The creep and creep-rupture properties of 13 heats of annealed 2 1/4 Cr-1 Mo steel were determined at 510 and 566°C (950 and 1050°F). The microstructures of all heats were primarily polygonal ferrite (75–80 percent); the balance was mostly bainite with 1–2 percent pearlite and scattered carbides. At each temperature the results indicated considerable data scatter for the high-stress (short rupture life) tests. As the stress was lowered, the creep and stress-rupture properties converged, which resulted in a decrease in the data scatter. Much of the variation and change in the properties could be attributed to the carbide precipitation reactions that occur in the steel.

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