Stress-rupture strength

E. B. Norris and E. A. Sticha, Effect of Hydrogen on the Stress-Rupture Strength of 2- 4Cr-lMo Steel, Metal Properties for the Petroleum and Chemical Industries (ASME G00103/MPC-2), American Society of Mechanical Engineers, New York, 1976, pp. 590-592. 

The basis for establishing the maximum allowable stress values in the ASME BPV Code is given in ASME BPV Code Sec. II Part D, Mandatory Appendix 1. At temperatures where creep and stress rupture strength do not govern the selection of stresses, the maximum allowable stress is the lowest of... 

At temperatures where creep and stress rupture strength govern, the maximum allowable stress is the lowest of... 

Mechanical properties include ultimate tensile strength, yield strength, ductility, fatigue endurance, creep resistance and stress rupture strength. Metallurgical properties refer to the physical and chemical characteristics of metallic elements and alloys, such as the alloy microstracture and chemical composition. Physical properties usually refer to the inherent characteristics of a material (i.e. density, melting temperature, heat transfer coefficient, specific heat, electrical conductivity, etc.). 

Fig. 3.1-37 Properties of 6061-T6 at elevated temperatures 1.0wt%Mg, 0.6wt%Si, 0.3wt%Cu, 0.25wt%Cr, artificially aged [1.9]. (1) tensile strength iJm at 20 °C, (2) stress rupture strength, (3) duration of exposure, (4) fatigue strength, (5) tensile strength at test temperature, (6) solution treated...

Stress rupture strength It is the unit stress at which a material breaks or ruptures. 

The creep stress-rupture strength of Ni-base superalloys increases with increasing y volume fraction,/y< (Jackson et al., 1977). This is in accordance with precipitation-hardening theory in the under-aged state, which shows (Ardell, 1985) that ... 

An extensive testing program has been Initiated to detenplne the burst strength, stress-rupture strength, and susceptibility to crack propagation of the process tube under conditions of elevated tenq rature and variable hydride concentration. Initially, these tests are made using samples of actual process tube under biaxial stress. These tests will provide the bases for comparison with similar tests made on samples of Irradiated process... 

This is a low-expansion, high-strength, precipitation-hardenable superalloy. It has significant improvement in notch stress-rupture strength over pyromet CTX-1. As with alloy CTX-1, a protective coating must be applied if the alloy is to be exposed at atmospheric conditions above 1000°F (538°C). Applications include gas turbine components. It has the following chemical composition ... 

Alloy CTX-909 is a high-strength, precipitation-hardenable super-alloy that offers significant improvements over alloys CTX-1 and CTX-3 due to its combination of tensile properties and stress-rupture strength to 1200T (649°C) in the recrystallized condition combined with the use of common age-hardening treatments. 

Thermospan alloy is a trademark of Carpenter Technology Corp. It is a precipitation-hardenable superalloy having an excellent combination of tensile properties and stress-rupture strength in the recrystallized condition with the use of common solution and age-hardening treatments. The alloy also exhibits a low coefficient of expansion over a broad temperature range. 

The stress that will cause fracture in a creep test at a given time in a specified constant environment. Also called stress-rupture strength. 

Stress-rupture strength after 10 hr (data taken from graph)... 

Stress -rupture strength after 12.5 hr Stress -rupture strength. after 4 hr E. P. Lapteva L.I.StruK from powder, particle size 40 (320 i) + 107o (127 m)+50% (75 p)... 

Stress -rupture strength after 13 hr Stress-rupture strength after 4 hr... 

The mechanical, metallurgical, and physical properties are the most relevant material properties to reverse engineer a mechanical part. The mechanical properties are associated with the elastic and plastic reactions that occur when force is applied. The primary mechanical properties include ultimate tensile strength, yield strength, ductility, fatigue endurance, creep resistance, and stress rupture strength. They usually reflect the relationship between stress and strain. Many mechanical properties are closely related to the metallurgical and physical properties. 

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