Showing papers on "Peening published in 1971"

Aluminum oxide pressure blasting abrasives and method of making

Abstract: An improved pressure blasting product adapted for cleaning and peening operations in general but having a particular use in a method of shot peening objects made of aluminum. A substantially solid sphere of a refractory oxide material is formed that is adapted to be blasted against the object to be cleaned or tempered, preferably the sphere is a bauxite material that has been fused and subsequently solidified by air quenching to produce small spheres each having a microcrystalline structure, the spheres all being substantially solid.

Plating by glass-bead peening

Abstract: Technique permits plating of primarily metallic substrates with either metals or nonmetals at normal temperature. Peening uses compressed air to apply concurrent streams of small glass beads and powdered plating material to the substrate.

Improvements in and relating to methods of treating welds to improve their mechanical properties

Abstract: 1,235,106. Altering physical properties; welding by fusion. INTERNATIONAL RESEARCH & DEVELOPMENT CO. Ltd. 7 Aug., 1968 [22 June, 1967], No. 28835/67. Headings B3R and B3V. A method of peening a fillet weld 3 to improve its mechanical properties comprises positioning an explosive charge 4 adjacent an exposed junction between the weld and parent metal and detonating the charge. The method increases the fatigue life of a weld and may be applied a second time before the weld is put under stress and also at intervals during the life of the weld. As shown, a pair of charges 4 is used for each weld 3, the charges being detonated simultaneously or the welds being treated separately. The charges may be supported away from the weld, Fig. 2 (not shown), and the shock waves transmitted through a solid or a liquid, e.g. under water.