Transverse creep and stress-rupture of borsic-aluminium composites and borsic-aluminium composites containing stainless steel and titanium

Composites ◽  
1974 ◽  
Vol 5 (1) ◽  
pp. 44-45
Keyword(s):  
Stainless Steel ◽  
Stress Rupture ◽  
Creep And Stress Rupture

Fine Microstructure of a Mechanically Alloyed Oxide Dispersion Strengthened Nickel-Base Superalloy

1977 ◽  
Vol 35 ◽  
pp. 298-299
Author(s):  
Jordi Marti ◽  
Timothy E. Howson ◽  
David Kratz ◽  
John K. Tien
Keyword(s):  
Solid Solution ◽  
Volume Fraction ◽  
Stress Rupture ◽  
Oxide Dispersion Strengthened ◽  
Solid Solution Alloy ◽  
Oxide Dispersion ◽  
Creep And Stress Rupture ◽  
Mechanically Alloyed ◽  
Fine Microstructure ◽  
Nickel Base

The previous paper briefly described the fine microstructure of a mechanically alloyed oxide dispersion strengthened nickel-base solid solution. This note examines the fine microstructure of another mechanically alloyed system. This alloy differs from the one described previously in that it is more generously endowed with coherent precipitate γ forming elements A1 and Ti and it contains a higher volume fraction of the finely dispersed Y2O3 oxide. An interesting question to answer in the comparative study of the creep and stress rupture of these two ODS systems is the role of the precipitate γ' in the mechanisms of creep and stress rupture in alloys already containing oxide dispersoids.The nominal chemical composition of this alloy is Ni - 20%Cr - 2.5%Ti - 1.5% A1 - 1.3%Y203 by weight. The system receives a three stage heat treatment-- the first designed to produce a coarse grain structure similar to the solid solution alloy but with a smaller grain aspect ratio of about ten.

AISI No. 664

Alloy Digest ◽  
1981 ◽  
Vol 30 (7) ◽  
Keyword(s):  
High Temperature ◽  
Stress Rupture ◽  
Heat Treating ◽  
Good Combination ◽  
Creep And Stress Rupture ◽  
High Temperature Alloy ◽  
Vacuum Melting ◽  
Stress Rupture Properties ◽  
Nickel Base ◽  
Rupture Properties

Abstract AISI No. 664 is a nickel-base high-temperature alloy that can be precipitation hardened because of its contents of aluminum and titanium. Vacuum melting is used in its production to provide excellent quality and reproducability. It is used for applications requiring a good combination of creep and stress-rupture properties up to about 1500 F. Typical applications are gas-turbine components, airframes and fasteners. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Ni-269. Producer or source: Nickel alloy producers.

Extrapolation of Creep Strength by Fracture Energy for 316FR Stainless Steel at 823K

2013 ◽  
Author(s):  
Yuji Nagae ◽  
Tai Asayama
Keyword(s):  
Stainless Steel ◽  
Energy Density ◽  
Fracture Energy ◽  
Creep Strength ◽  
Stress Rupture ◽  
Energy Approach ◽  
Time To Failure ◽  
Design Life ◽  
Time To Rupture ◽  
Density Rate

316FR stainless steel is a candidate material to be used for a reactor vessel and internals for fast reactors with a design life of 60 years at an operating temperature of 823K. This paper describes an extrapolation approach based on fracture energy for calculating creep strength. A change in fracture energy is assumed to be expressed as a power-law function of time to failure and energy density rate. The energy density rate is calculated using initial stress, rupture elongation, and time to rupture. It is important to evaluate a change in rupture elongation for the extrapolation of creep strength at 823K. The time to rupture at 823K is estimated and extrapolated on the basis of the fracture energy approach. This paper shows the validity of extending the design life to 60 years by using the Larson–Miller parameter compared with the estimation by the fracture energy approach.

Creep and Stress Rupture

2018 ◽  
pp. 111-119
Author(s):  
C. T. Lynch ◽  
J. P. Kershaw
Keyword(s):  
Stress Rupture ◽  
Creep And Stress Rupture
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