Thesis (Ph.D) - University of Birmingham, Dept of Mechanical Engineering.
A preform and method for forming preforms and structural members are provided. The preform can be formed by cold spraying a structural material onto a base member, such that the preform has dimensions approximating the dimensions of the machined structural member to thereby reduce material waste and machining time when forming the structural member from the by: Preforms The best mechanical properties were achieved when using nitrogen as the atomizing gas and when following the spray-forming operation by forging step (55% reduction). Table II summarizes the results for material processed in this manner. Table II. Mechanical Properties Observed for Alloy Using the design freedom and possibilities to locally engineer material, additive manufacturing could be combined with forging operations to novel process chains, offering the possibility to reduce the number of forging steps and to create near-net shape forgings with desired local by: 4. Prediction of thermal history of preforms produced by the clean metal spray forming process Article in Materials Science and Engineering A (1) March with 17 Reads.
tioning of the parting line. When using multistage forging, the shapes of the preforms are selected, the blocker dies are designed, and the initial billet geometry is determined. In making these selec-tions, the forging designer considers design param-eters such as grain flow, parting line, flash dimen-sions, draft angles, and fillet and corner Size: 1MB. The objective of the program was to develop methods for making aircraft quality parts from forged Inconel Alloy metal powder preforms. Aircraft quality parts were defined as those having room-temperature tensile and fatigue properties, and °F. tensile and °F. stress-rupture properties meeting aircraft : Bernard Triffleman, F. C. Wagner, Keki K. Irani. Forging produces directional alignment (or "grain flow") for important directional properties in strength, ductility, and resistance to impact and fatigue. These properties are deliberately oriented in directions requiring maximum strength. Properly developed grain flow in forgings follows the outline of Location: 23rd Avenue Rockford, IL, Friction, flexibility and compressive properties. The smooth operation of any preform manufacturing process such as braiding, weaving or knitting is determined by, among others, the flexibility and friction characteristics of the material processed. In all these processes, a fibrous strand often comes into contact with a metallic surface or against another fibrous strand while it is moving at .
Hammer and Press Forging Generally, forged components are shaped either by a hammer or press. Forging on the hammer is carried out in a succession of die impressions using repeated blows. The quality of the forging, and the economy and productivity of the hammer process depend upon the tooling and the skill of the operator. In the present study, the design of a novel processing route using additively manufactured preforms for hot working is considered. The microstructure evolution of AM pre-forms is investigated during hot working and heat treatment and compared to conventional wrought material with a lamellar microstructure typically used for by: 3. Spray forming involves sequential gas atomization of a melt into a spray of fine droplets and their deposition on a substrate to build up a high-density preform. Design Rules for Parts Made From Impression Die Forgings Sections through give design rules that are specific to the designated forging process. Please refer to Section Prints and Specifications for design information which is applicable to all forging processes.