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Title: THE FAILURE OF STRUCTURAL METALS SUBJECTED TO STRAIN-CYCLING CONDITIONS

Abstract

Data showing the isothermal strain-cycling capacity of three metals, inconel, Hastelloy "B," and beryllium, are presented. It is noted that at frequencies of 0.5 cycles per minute the data satisfied am equation of the form N/ sup alpha / epsilon /sub p/ = K, where N is the number of cycles to failure, epsilon /sub p/ is the plastic strain per cycle, and alpha and K are constants whose values depend on the structure and test conditions. Data on Ihconel are given to establish the effect of grain size, specimen geometry, temperature, and frequency. It is found that at temperatures above 1300 F, grain sine amd frequency exert a pronounced effect on the rupture life. Fine-gralned metal survives more cycles before failure than coarsegrained material. Lomg time cycles shorten the number of cycles to failure when the strain per cycle is low. Thermal strain cycling dain for ihconel are compared to strain cycling data at the same mean temperature. Good correlation is found to exist between the two types of data. (auth)

Authors:
;
Publication Date:
Research Org.:
Oak Ridge National Lab., Tenn.
OSTI Identifier:
4298702
Report Number(s):
ORNL-2619
NSA Number:
NSA-13-001388
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-59
Country of Publication:
United States
Language:
English
Subject:
METALLURGY AND CERAMICS; ALUMINUM ALLOYS; BERYLLIUM; CHROMIUM ALLOYS; CONFIGURATION; DEFORMATION; EQUATIONS; FAILURES; FREQUENCY; GRAIN SIZE; HASTELLOY; HEATING; INCONEL ALLOYS; MOLYBDENUM ALLOYS; NICKEL ALLOYS; NIOBIUM ALLOYS; TEMPERATURE; TITANIUM ALLOYS

Citation Formats

Swindeman, R.W., and Douglas, D.A. THE FAILURE OF STRUCTURAL METALS SUBJECTED TO STRAIN-CYCLING CONDITIONS. United States: N. p., 1958. Web. doi:10.2172/4298702.
Swindeman, R.W., & Douglas, D.A. THE FAILURE OF STRUCTURAL METALS SUBJECTED TO STRAIN-CYCLING CONDITIONS. United States. doi:10.2172/4298702.
Swindeman, R.W., and Douglas, D.A. Sat . "THE FAILURE OF STRUCTURAL METALS SUBJECTED TO STRAIN-CYCLING CONDITIONS". United States. doi:10.2172/4298702. https://www.osti.gov/servlets/purl/4298702.
@article{osti_4298702,
title = {THE FAILURE OF STRUCTURAL METALS SUBJECTED TO STRAIN-CYCLING CONDITIONS},
author = {Swindeman, R.W. and Douglas, D.A.},
abstractNote = {Data showing the isothermal strain-cycling capacity of three metals, inconel, Hastelloy "B," and beryllium, are presented. It is noted that at frequencies of 0.5 cycles per minute the data satisfied am equation of the form N/ sup alpha / epsilon /sub p/ = K, where N is the number of cycles to failure, epsilon /sub p/ is the plastic strain per cycle, and alpha and K are constants whose values depend on the structure and test conditions. Data on Ihconel are given to establish the effect of grain size, specimen geometry, temperature, and frequency. It is found that at temperatures above 1300 F, grain sine amd frequency exert a pronounced effect on the rupture life. Fine-gralned metal survives more cycles before failure than coarsegrained material. Lomg time cycles shorten the number of cycles to failure when the strain per cycle is low. Thermal strain cycling dain for ihconel are compared to strain cycling data at the same mean temperature. Good correlation is found to exist between the two types of data. (auth)},
doi = {10.2172/4298702},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Nov 01 00:00:00 EST 1958},
month = {Sat Nov 01 00:00:00 EST 1958}
}

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