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1、Keeping pace with new technology turbine blades, turbine buckets, we are committed to meet the needs of the most demanding gas turbine operators.Gas turbine Blades, turbine buckets with fully turbulated cooling holes.Small or large Z form design turbine blades, turbine buckets.Gas turbine blades, tu
2、rbine buckets with peripheral cooling schemes.Cooling holes produced within the casting of gas turbine blades, turbine buckets.Our cutting edge machines capable of running over 100 HP manufacture turbine blades and turbine vanes that reduces normal delivery cycles and costs by half.Turbine blades, t
3、urbine buckets with complex serration machining and modified pin slots to reduce vibration and increase part life.Precision, super alloy investment castings developed for all row turbine blades, turbine buckets.Gas turbine blade, turbine bucket tip cutbacks to meet any modification requirements.Hydr
4、aulic fixtures and our state of art CNC machines can produce turbine blade lengths of up to 60 inches.Corrosion resistant bond coating applied on turbine blades, turbine buckets to provide high adhesion and low oxide content.Ceramic top coating applied on turbine vanes, turbine nozzles for high temp
5、erature resistant thermal cycling, reduction of part strain and stress.Shortcut to content Expertise | Expert Information | Service | New | About BAM Contact | Disclaimer | Site Map | Search | Deutsch Home Expertise Expertise Materials Engineering Mechanical Behaviour of Materials Analytical Chemist
6、ry; Reference Materials Chemical Safety Engineering Containment Systems for Dangerous Goods Materials and Environment Materials Engineering o Composition and Microstructure of Engineering Materials o Mechanical Behaviour of Materials o Service Loading Fatigue and Structural Integrity o Advanced Cera
7、mics o Safety of Joined Components o Mechanical Behaviour of Polymers Materials Protection and Surface Technologies Safety of Structures Non-Destructive Testing Accredtation, Quality in Testing Working groupModelling and Simulation of Mechanical Behaviour of MaterialsExamples of activities of the wo
8、rking group Physically based material modelling Determination of material parameters, model verification High speed loading/cutting Loading in a turbine blade Notch in a single crystal Microsystem technology, flip chip Determination of the elastic constants of anisotropic materialsPhysically based m
9、aterial modellingHere in the case of Nickel base superalloys with a high volume fraction of the precipitate phase. Nickel base superalloys, also as single crystals, are widely used for hot section of turbine blades in power plants or aero engines. A specific constitutive law has been developed and i
10、mplemented in an FE code, which explicitly takes into account the intricate interactions between dislocations and precipitates.Representation of the precipitates (in grey) in an octahedral 111 slip plane and of the main dislocation mechanisms of a single crystalline fcc superalloy:1. Filling of matr
11、ix channels with dislocation half-loops (blue)2. Shearing of matrix and precipitates by large dislocation segments (red)3. Multiple cross slip between phase boundaries, resulting in macroscopic cubic slip (purple)4. Climbing of dislocation loops around the precipitates, resulting in a recovery of th
12、e internal stresses (green)The complex interactions between dislocations and precipitates and the stress fields generated by the interface dislocations are responsible for essential features of the macroscopic deformation behaviour of these alloys. Some of them are listed below: importance of cubic
13、slip and its relation to the crystal orientation recovery mechanisms strength degradation due to directional coarsening of the precipitatesDetermination of Material Parameters, Model VerificationSimulation of the stress-response with a viscoplastic constitutive model at a non-isothermal, axial-torsi
14、onal, cyclic straning for the verification of the model:Comparison of the experiment on a hollow specimen (left) with the numerical simulation (right), 15 min hold-times at 850 C, material: IN738LCThe model was exclusively adapted to isothermal, uniaxial tensile, LCF and creep tests. The physical co
15、ntrol of the optimization was realized by relating of material parameter groups to different hardening and softening phenomena in the material behaviour. One set of material parameters wasdetermined for each testing temperature.High Speed Loading/CuttingThe behaviour of metallic materials at high loading rates is characterised primarily by a thermal softening due to the fact that the loading time is too short for a sufficient heat flow. The softening can lead to the formation of shear bands. For
