ISSN:
0933-5137
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Description / Table of Contents:
Measurement of three-dimensional residual stresses at rolled bars with high hardnessBars out of 56 Ni Cr Mo V 7, a diameter of 63 mm and a length of 100 mm were rolled with a force of 12 kN and 27 kN. The hardness of the bars was 2150 N/mm2. In 8 different direction along the surface the residual stresses were determined with the help of x-ray diffraction. This was done several times after electrolytic reduction of the material at the measuring zone to get a stress profile in dependence of the depth. Afterwards in two dimensions along the surface and perpendicular to the surface the residual stresses inclusive the shear stresses were determined. High compressive residual stresses were along the surface, but therefore tensile residual stresses were perpendicular to the surface at a zone of around 1.5 mm depth. A comparison of the residual stresses with stresses induced by shot peening is done.
Notes:
Bei der Bestimmung der 3dimensionalen Eigenspannungszustände zeigt sich, daß die einzelnen Eigenspannungsverläufe miteinander korrespondieren. Die Druckeigenspannungsbereich reicht beim Festwalzen bis in eine Tiefe von 2 mm, wobei sich ein Druckeigenspannungsplateau im Bereich ab 0,5 mm Tiefe für mehre Zehntel Millimeter ausbildet. Bei F=27 kN sind die Effekte entsprechend ausgeprägter. Im Vergleich zum Festwalzen ist beim Kugelstrahlen die Druckeigenspannung im Bereich bis 0.5 mm Tiefe zu finden.
Additional Material:
9 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mawe.19980290507
Permalink
