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Aquest Treball de Fi de Màster presenta unes activitats amb una eina tecnològica digital com es un simulador de soldadura de RA, com element de promoció de cicles formatius de tecnologies industrials amb molta demanda laboral i un grau d'inserció de quasi el 100% dels titulats. Ja fa uns anys que les institucions públiques s'està promocionant els estudis de cicles formatius com el camí mes directe per accedir al mon laboral fent campanyes de difusió i promoció generalitzades potenciant l'opció de la formació al centres de treball en la seva modalitat de FPDual, però la demanda esta molt desproporcionada entre les famílies professionals dels sectors informàtic i sanitari en relació als de les tecnologies industrials. Amb les activitats proposades i l'ús d'aquestes tecnologies d'última generació es vol donar conèixer als estudiants de l'ESO les especialitats industrials i captar l'atenció de alumnes potencials pels cicles formatius.

Viewgraphs of presentation on the properties of a new high-strength weldable titanium alloy T110., See also ADM001672. The original document contains color images. Presented at the NATO Advanced Research Workshop on Metallic Materials with High Structural Efficiency held in Kiev, Ukraine on 7-13 Sep 2003.

There has been wide support for the continued reduction in weight of heavy armor combat systems. Of course no one is willing to give up performance with this reduction in weight. This program investigated the feasibility of utilizing Ti-6Al-4V as an alternate armor material for the Ml Abrams turret glacis as opposed to the presently utilized RHA steel. Two turret glacis test sections were fabricated from Ti-6A1-4V armor plate, and one was fabricated from RHA steel. These sections were ballistic tested vs. common threats. The weld joint design is described from a theoretical basis as well as functional performance. The ballistic results of all test sections are discussed in detail, and recommendations for future work are provided., Original contains color plates: All DTIC reproductions will be in black and white.

International Publication Number: WO 00/75634 A1. International Application published under the Patent Cooperation Treaty. U. S. Provisional Application Serial No. 60/138,144 filed June 8, 1999.

Part 1: Fracture Mechanics of Materials. Includes: Fracture Mechanics; Dynamic Fracture; Computational Mechanics; and Damage Mechanics. (678 Pages) Part II: Behavior of Materials and Structure: Includes: Fracture Physics; Fatigue and Creep; Polymer and Polymer Composites; Metals, MMCs, Ceramics, and CMCs; and Welding. (672 Pages), ADA382021

Part I: Fracture Mechanics of Materials. Includes: Fracture Mechanics; Dynamic Fracture; Computational Mechanics; and Damage Mechanics. (678 Pages) Part II: Behavior of Materials and Structure: Includes: Fracture Physics; Fatigue and Creep; Polymer and Polymer Composites; Metals. MMCs, Ceramics, and CMCs; and Welding. (672 Pages), ADA382020

The objective of this program was to provide the United States Marine Corps Logistics Bases, Albany, GA, engineering support services for the AAV RAM transmission. The TARDEC Fuels and Lubricants Research Facility (TFLRF) at Southwest Research Institute (SwRI), in conjunction with AERA, Inc. was tasked to perform an independent assessment and evaluation of past literature and seal, housing, and fluid problems and other failures modes related to the IRAM transmission. Visits were made to Logistics Bases, Albany; GA, Barstow, CA; and 29 Palms, CA to discuss problem areas and evaluate an on-going field demonstration. The preferred cast iron seal ring was selected based on the field demonstration. Other problem areas with the IRAM transmission had already been addressed AERA or solutions are currently in progress.

In 1977, the first intrinsic electronically conducting organic polymer, doped polyacetylene, was reported, spurring interest in "conducting polymers." These polymers are a different class of materials than conducting polymers, which are merely a physical mixture of a non- conductive polymer with a conductive material such as metal or carbon powder. Initially these intrinsically conducting polymers were neither processable nor air stable. However, later generations of these polymers were processable into powders, films, and fibers to form electrically conductive blends. Applications of these polymers, especially polyanilines, have begun to emerge. These inelude blends and coatings for electrostatic dissipation and electromagnetic interference (EMI) shielding, electromagnetic radiation absorbers for welding (joining) of plastics, conductive layers for light- emitting polymer devices, and anticorrosion coatings for iron and steel.

Distributed control architectures are becoming increasingly popular because their modularity makes them easy to install, configure, and modify. These benefits do not come for free. A population of asynchronously executing processes without central top-down control can exhibit unexpected or emergent" behavior at the system level. To the plant engineer, this behavior may look lIke noise or error conditions, but it is generated by deterministic interactions among control elements, not random events or unit malfunctions, and it must be managed accordingly. Drawing on experiences in the Auto Body Consortium's Intelligent Resistance Welding project, we illustrate the potential for this kind of behavior among welding robots in an automotive body shop and in other applications, show how recent research in nonlinear systems theory and agent-based control can be used to detect and manage such interactions, and identify some requirements that these agent techniques place on emerging standards for data and control models., Presented at ISA-Tech'97, Anaheim, CA.

The electrical conductivities of the intrinsically conducting polymer systems now range from that typical of insulators (

The objective of this project was to investigate new materials and shapes available for use as gaskets in sealed containers. The properties of the new materials had to be evaluated/tested to assure they met or exceeded the properties of current gasket materials. The project also looked at the manufacturing processes of extruding vs. molding. We also investigated the joint bonding process of using chemical adhesive as well as vulcanizing and heat welding. Another aspect of the project was to evaluate the required cross sectional area and hence the compression required to create a sealed container repeatedly with the minimum amount of force.

This research program aimed to achieve a better understanding of pyrometallurgical reactions during welding and process-microstructure correlations. The validity of proposed mechanisms for the formation of weld metal acicular ferrite was tested by using selected surrogate additions with similar chemical behavior but different physical properties compared to titanium-boron additions known to promote acicular ferrite formation. The results suggest that inclusion density and size distribution are the most important factors in acicular ferrite formation. The evolution of inclusions in the weld pool during welding and solidification was modeled. Procedures are reported for the use of shielding gas oxygen content as a welding parameter to optimize weld metal microstructure and properties. Exothermically-assisted shielded metal arc welding consumables were evaluated as a possible means to substitute chemical energy for traditional electrical energy during welding. Exothermic reactions produced up to 40 pct. of the heat required for welding. The influence of electrochemical reactions during welding on weld metal composition was investigated. Evidence of electrochemical behavior in specific welding parameter ranges was found. A search for new non-destructive evaluation techniques and associated procedures to measure specific weld metal compositions or constituents was undertaken. As a demonstration, magnetic property measurements were used to detect phase transformations in Al-Cu alloys.

This report is the first of a three year Army Manufacturing, Science, and Technology (MS&T) Congressionally mandated effort to investigate the weldability of a specific grade of austempered ductile iron (ADI). This specific grade of ductile iron was developed under MS&T project 5904948 and has mechanical properties after austemper heat treatment of 140,000 psi minimum yield strength and 80/c minimum elongation. This report describes the use of the Gleeble experimental technique to produce the thermal cycles experienced in welding, thus creating simulated weld heat affected zones (HAZ). Simulated HAZ were produced for two different weld energy inputs and five weld preheat temperatures. Weldability was assessed by measuring resultant hardness and through microstructural observations of the as-welded and subsequently austempered material. Results of this work provide a foundation of knowledge in the as- welded heat affected zone, determine the extent of recovery of the weld (HAZ) due to subsequent austemper heat treatment, and provide information on suitable preheat temperatures and weld energy inputs for actual weld trials. jg

The M1-PMO, in conjunction with the US Army Research Laboratory (ARL) would like to potentially up-armor the M1 family of vehicles by increasing the hardness of rolled homogeneous armor (RHA) MIL-A-12560 steel. The basic thrust of the program is to utilize lower tempering temperatures and chemist of slightly more hardenability to produce a RHA armor with a Rockwell 'C' hardness of 39-48 without altering the current specification MlL-A-12560 steel. It is believed that the increased hardness levels will provide increased ballistic protection against large caliber kinetic energy threats. Weldability and material property tests were performed on the improved hardness RHA steel supply by the US ARL. The program involves basic material characterization, weldability, machinability and plate cutting studies. The material characterization was performed on two thicknesses (1.25' and 1.50'). The weldability study included Y-groove preheat testing, stud welding and maximum heat input testing. The machinability testing involved machining parts including drilling, tapping, reaming, boring and milling. Plasma and Oxy-fuel thermal cutting were studied to gauge processing of the steel by present armor vehicle fabrication. The ballistic testing was performed by US Combat Systems Test Activity (CSTA) at Aberdeen MD. The results show the candidate steel can processed typical to RHA steel with minor impact to welding and machining.

The objective of this program was the development of an alternative test method for testing sample weld plates for weld procedure qualification, using shaped charges instead of the Ballistic Weld Test Procedure of MIL-STD- 1941(MR). The proposed method would have reduced turnaround time and cost by allowing locally conducted testing, achieving weld test results in a much shorter time. Charge placement would have been accurately controlled, eliminating the need for duplicate samples because impact locations were unacceptable. Testing to date indicates that the charge sizes required to form an impression similar to the ballistic projectile would result in too much noise and ground vibration for local use. Also, the measured weld damage and impression depth do not appear to be consistent with charge size. Keywords: Ballistic weld test procedures; Armor plate; Shaped charges; Projectile impact test; Terminal ballistics; Explosions.

A computer cost model of suppressive shielding structures has been constructed and is presented in the report. This model consists of design-aid and cost estimation programs which, with proper inputs, calculates and outputs specific design and cost variables of suppressive structures. Design variables include the following: venting coefficient, plastic bending and yield moments of beams, penetration of primary fragments, and the total effective thickness of plates. Cost output variables include: material, fabrication, welding, and total costs of panels, frame, door, and foundation of a cubical suppressive structure. A description of the model and its construction details are reviewed in the report. A user's guide which includes step by step instructions in data inputs is also provided.

Survey results are based on responses from 66 percent of the personnel assigned in the AFSC 552X5 career ladder. Thirty-six percent of the total sample entered the plumbing career ladder by completion of the resident training course. Thirty percent entered by direct duty assignment without a bypass test. Over 75 percent of the survey respondents indicated that their jobs were interesting. Even higher percentages felt that their talents and training were effectively utilized. These measures of job satisfaction are considerably above the averages reported by respondents to 30 surveys completed in 1974. Actual reenlistment for FY75 varied somewhat from reenlistment intentions as reported by first term, second term and career enlistment groups. Actual rates of reenlistment for FY75 were considerably higher for second term and career groups. The first term rate was slightly lower than the survey results indicated. The primary factors in grouping jobs within the career ladder were supervisory tasks and number of tasks performed. There were no groupings which corresponded to functional assignment, command, or equipment used. Time in the career field was only a factor, in that the number of tasks performed increases as time in the field increases and the gradual addition of supervisory tasks with increases in career field time.

The report contains abstracts and news items on metals, alloys and superalloys, analysis and testing of metals and materials, coatings, composites, metal corrosion, extraction and refining, forming, instrumentation, lubricants, mechanical and physical properties of metals, powder metallurgy, textiles, welding practice, glass and ceramics, heat treatment, nuclear science and technology, semiconductor technology, thermomechanical treatment, and related fields.

This report contains information concerning the science and technology of West Europe. The article includes electronics and industrial technology topics.

This document contains articles on Materials Science and Metallurgy

It is known that certain welded details adversely affect the fatigue life of bridge members. The utility and feasibility of steel to steel adhesive bonded c%nnections as substitutes for such details is evaluated. Large scale fatigue tests indicated that adhesives can perform structural functions equal to those of welds without decreasing the fatigue life of beams.

Results of tension and compression tests on angle segments are used to generate moment-rotation curves for welded-welded double framing angle connections. The beam line concept is then used to determine the connection moments for connection depths of 18 to 32 inches. With the connection moments known, the two welds, denoted as Weld A and Weld B in the AISC Manual Table IV are evaluated. Because the analytical model used to generate the weld sized published in the AISC Manual and analytical model used in this research differ, it was found that the capacities of the connection designs in the AISC Manual for Weld B have factors of safety ranging from 2.5 to 3.0. Design aids are included which give the connection moments for a variety of designs as a function of the length to depth ratio of the beam for the case of uniform loading.