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.

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.

ALLVAC 500 ZB

Alloy Digest ◽  
1990 ◽  
Vol 39 (3) ◽  
Keyword(s):  
Precipitation Hardening ◽  
Stress Rupture ◽  
Heat Treating ◽  
Vacuum Arc ◽  
Vacuum Induction Melting ◽  
Induction Melting ◽  
Vacuum Arc Remelting ◽  
Tensile Fatigue ◽  
Stress Rupture Properties ◽  
Rupture Properties

Abstract ALLVAC 500 ZB is an austenitic precipitation hardening alloy which develops outstanding tensile, fatigue and stress-rupture properties. It is suited to longtime service requirements up to 1800 F (982 C). It is produced by vacuum induction melting plus vacuum arc remelting. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-380. Producer or source: Allvac Inc..

Rejuvenation Heat Treatment and Weld Repairability Studies of HAYNES® 230® Alloy

2000 ◽  
Author(s):  
Dwaine L. Klarstrom ◽  
Gregory L. Hoback ◽  
Venkat R. Ishwar ◽  
Javaid I. Qureshi
Keyword(s):  
Heat Treatment ◽  
Room Temperature ◽  
Treatment Time ◽  
Stress Rupture ◽  
Haynes 230 ◽  
Gas Tungsten Arc ◽  
Transverse Tensile ◽  
Stress Rupture Properties ◽  
Service Exposure ◽  
Rupture Properties

A series of studies were undertaken to determine the optimum rejuvenation heat treatment of HAYNES 230 alloy and to examine its weld repairability. To simulate service exposure, samples of plate nominally 4.75 mm (0.187 in.) thick were exposed at temperatures of 760°C (1400°F) and 871°C (1600°F) for a period of 1500 hours. Room temperature tensile properties and stress-rupture properties at 927°C (1700°F)/62 Mpa (9 ksi) were determined and compared to the material in the unexposed condition. Rejuvenation heat treatments of exposed materials were performed at a temperature of 1177°C (2150°F) for times of 30 minutes to 3 hours followed by a rapid air cool. In all cases, the room temperature tensile and the stress-rupture properties were found to be comparable to those for the unexposed condition. Based on these data, a heat treatment time of 30 minutes was judged to be adequate. Plates representing the as-received, exposed, and exposed and rejuvenated conditions were gas tungsten arc welded (GTAW) using 230-W™ filler metal. Transverse tensile samples containing the weldments were tested at room temperature, and face and root weldment samples were bent around an approximate 2T radius. All of the results, including those for the exposed condition, were found to meet the requirements of Section IX of the ASME Boiler and Pressure Vessel Code.

Effect of Cast and Heat Treatment Processes on Microstructure and Properties of K4169 Superalloy

2021 ◽  
Vol 315 ◽  
pp. 25-30
Author(s):  
Ye Da Lian ◽  
Li Qiang Gao ◽  
Ping Wang ◽  
Qian Yin ◽  
Pin Pin Hu ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Room Temperature ◽  
Hot Isostatic Pressing ◽  
Stress Rupture ◽  
Microstructural Stability ◽  
Treatment Processes ◽  
Stress Rupture Properties ◽  
Δ Phase ◽  
Rupture Properties ◽  
Microstructure And Mechanical Property

The effects of cast and heat treatment processes on microstructure and mechanical property of K4169 alloy have been investigated. The results show that low shell and pouring temperature can significantly improve the room temperature tensile and elevated temperature stress-rupture properties of the alloy; The joint function of hot isostatic pressing (HIP) and homogenization+solution+aging (HSA)standard heat treatment can effectively close casting defects such as micro-looseness, significantly improve the segregation of the alloy structure, basically eliminate the Laves phase, only a small amount of MC carbide dispersed in the grain boundary and short rod-shaped δ-phase. What is the most significant is that a large number of lenticular γ'' phases are uniformly precipitated, Which enhance the microstructural stability, and significantly improve the room temperature tensile properties and high temperature endurance properties of K4169 alloy.

Metallurgical Studies on Gas Turbine Blade Materials After a Long Term Service

1969 ◽  
Author(s):  
H. Susukida ◽  
D. Sunamoto ◽  
Y. Sakumoto
Keyword(s):  
Fatigue Strength ◽  
Gas Turbine ◽  
Turbine Blade ◽  
Rupture Strength ◽  
Stress Rupture ◽  
Gas Turbine Blade ◽  
Stress Rupture Properties ◽  
Similar Temperature ◽  
Rupture Properties

This paper deals with the changes of tensile, impact, and stress-rupture properties and microstructure of gas turbine blade materials due to long term heating at the temperature of 650 C (1200 F) to 800 C (1470 F) for up to 10,000 hr or due to the service operation at similar temperature range on several occasions in 34,000 hr. The relation between the above changes of the properties and the thermal fatigue strength, and the stress-rupture strength and the fatigue strength at 700 C (1292 F) and 750 C (1382 F) under corrosive environment containing vanadium and/or sulfur were also investigated. The materials involved are several heat resisting alloys such as Inconel 700, Inconel X, S816. Useful information for selection of gas turbine blade materials was obtained.

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.

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.

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