Intermetallic Compounds, Vol. 3 Structural Applications Of by J. H. Westbrook, R. L. Fleischer

By J. H. Westbrook, R. L. Fleischer

This quantity is one in all 4, each one of which is composed of reprinted chapters from the hugely acclaimed, entire two-volume set Intermetallic Compounds: ideas and perform. released in 1995. every now and then the writer or authors have additional a quick addendum to carry their bankruptcy brand new and in different instances more moderen references were extra. Chapters were chosen and grouped in topic components to supply extra simply available and straight forward volumes for person researchers. the opposite titles during this four-volume set are: Crystal constructions of Intermetallic Compounds simple Mechanical houses and Lattice Defects of Intermetallic Compounds Structural purposes of Intermetallic Compounds Annotation individuals Preface to the 1995 variation Preface to Reprint Volumes Acronyms Crystal constitution Nomenclature Ni3Al in Nickel-Based Superalloys (Donald L. Anton ) Ni3Al and its Alloys (C. T. Liu and David P. Pope ) NiAl and its Alloys (Daniel B. Miracle and Ramgopal Darolia ) Gamma TiAl and its Alloys (S. C. Huang and J. C. Chesnutt ) Ti3Al and its Alloys (Dipankar Banerjee ) Zr3Al: a possible Nuclear Reactor Structural fabric (Erland M. Schulson ) Al3Ti and its Ll2 diversifications (Masaharu Yamaguchi and Haruyuki Inui ) Al-Rich Intermetallics in Aluminum Alloys (Santosh ok. Das ) FeAl and Fe3Al (Krishna Vedula ) Silicides: technological know-how, Technoolgy and functions (K. Sharvan Kumar ) Miscellaneous Novel Intermetallics (Robert L. Fleischer ) Intermetallics as Precipitates and Dispersoids in High-Strength Alloys (Alan J. Ardell ) Intermetallic Composites (Daniel B. Miracle and Madan G. Mendiratta ) Index Contents of 1995 variation

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It is generally agreed that the von Mises criterion is better suited for common pressure vessels, the ASME Code chose to use the Tresca criterion as a framework for the design by analysis procedure for two reasons: (a) it is more conservative, and (b) it is considered easier to apply. 1). In order to avoid dividing both the calculated and the yield stress by two, the ASME Code defines new terms called stress intensity, and stress difference. The stress differences (Sij) are simply the algebraic differences of the principal stresses,  1,  2, and  3, so that S1;2 ¼ 1 À 2 ;S2;3 ¼ 2 À 3 ;S3;1 ¼ 3 À 1 ð3:8Þ The stress intensity, S, is the maximum absolute value of the stress difference  À S ¼ max S1;2 ;   S2;3 ;  Á S3;1  ð3:9Þ In terms of the stress intensity, S, Tresca criterion then reduces to S ¼ y ð3:10Þ Throughout the design by analysis procedure in the ASME Code stress intensities are used.

For a straight bar in tension, a load producing yield stress, Sy, results in a collapse. If it is loaded in bending, collapse does not occur until the yield moment has been increased by the shape factor of the section. The shape factor, , is defined as the ratio of the load set producing a fully plastic section to the load producing initial yielding of the extreme fibers of the section. 5. The current stress intensity limits in the ASME Code rules are based on rectangular cross sections. For combined axial and bending loads, the load set to form a ‘‘plastic hinge’’ depends on the ratio of the tensile and bending loads.

3. Guideline 3 defines stress classification lines (SCL) and stress classification planes (SCP) for the purpose of evaluating membrane and bending stresses. 1. 1 Stress classification line (SCL). Copyright 2005 by CRC Press, Inc. All Rights Reserved. 4. Guideline 4 establishes the global locations for assessment of stresses, and states that the general primary membrane stress intensity, Pm, should be evaluated remote from a discontinuity; whereas the primary membrane plus bending stress intensity, PL þ Pb, and primary plus secondary stress intensity, P þ Q, should be evaluated at a discontinuity.

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