By Eric Kula
The military fabrics and Mechanics examine heart in coop eration with the fabrics technology team of the dept of Chemical Engineering and fabrics technology of Syracuse collage has been accomplishing the yearly Sagamore military fabrics learn convention seeing that 1954. the categorical objective of those meetings has been to collect scientists and engineers from educational associations, and govt who're uniquely certified to discover intensive a topic of significance to the dept of security, the military and the clinical neighborhood. those complaints, entitled RESIDUAL tension AND tension rest, deal with the character of residual stresses and their measurements, the resources of residual pressure, rigidity leisure, sub-critical crack development within the presence of residual tension, residual stresses and houses, and study in development. we want to recognize the help of Mr. Dan McNaught of the military fabrics and Mechanics study middle and Mr. Robert J. promote and Helen Brown DeMascio of Syracuse collage during the phases of the convention making plans and at last the ebook of the publication. the continuing energetic curiosity and help of those meetings by way of Dr. E. Wright, Director of the military fabrics and Mechanics study middle, is appreciated.
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Additional info for Residual Stress and Stress Relaxation
I) thermally induced stresses ii) stresses due to the phase transformation below the surface layer iii) stresses due to the pearlitic transformation of the surface itself. This contribution can be neglected. 32 T. ERICSSON AND B. HILDENWALL 800 400 ..... I iii ...... 200 0 I ·200 fIJ -400 -800 Fig. 15. 0 2 & 4 DepIh(mm) 8 Calculated residual stress in a carburized cylinder <0 = 17 mm). Quenched in oil (60 0 C) from 820 0 C3 • Induction Hardening In induction hardening the heat generation is mainly localized to the case.
Efforts were also made to develop finite-element programs for analyzing two-dimensional stresses during bead-on-plate and butt welding of plateslO,ll. During the last 10 years continuous efforts have been made to improve and expand our capability of analyzing transient thermal stresses, residual stresses, and distortion in weldments. Programs which have been developed to date include (see Figure 4): 1. Basic one-dimensional program 2. Basic two-dimensional finite-element program 3. Programs for analyzing practical programs a.
Royal Soc. 283A:403 (1965). -G. V. S. Kirkaldy, ed. AIME, Warrendale (1978). E. Schmidtman, H. S. , 31:125 (1976). E. Gautier, A. Simon and G. Beck, Deformation of Eutectoid Steel During Pearlitic Transformation Under Tensile Stress, in "Strength of Metals and Alloys" P. Haasen, V. Gerold and G. , Pergamon Press (1979). P. Koistinen, The Distribution of Residual Stresses in Carburized Cases and their Origin, Trans. ASM 50:227 (1958). J. R. , Longman, London (1970). B. Hildenwall and T. Ericsson, Residual Stresses in the soft Pearlite Layer of Carburized Steel, ~.