Total Results: 14105
Mechanical Behaviour of an Aluminium Alloy With Fusible Grain Boundaries
92
Authors: B. Baudelet; M. C. Dang; F. Bordeaux; INSTITUT NATIONAL POLYTECHNIQUE DE GRENOBLE (FRANCE)
7000 SERIES Al alloy was shown to have a liquid grain boundary, the extent and distribution of which depended on the thermal history of the material. If T was less than 477 C (melting temperature of the boundary), the solid material displayed classical mechanical behavior. At T greater than 477 C, it was observed that the liquid grain boundary influenced the mechanical behavior of the alloy. At higher strain rates ...
Creep Fracture Mechanisms in Single Crystal Superalloys
92
Authors: S. H. Ai; V. Lupinc; M. Maldini; ACADEMIA SINICA SHENYANG (CHINA) INST OF METAL RESEARCH
Using constant load creep tests, the creep fracture mechanisms of single crystal superalloys CMSX-2, SRR 99 and RR 2000 were studied. Crystals having orientations within 12 degrees of were tested in air between 750- 1000 C. It was shown that creep cracks always initiated at carbides in alloys containing a higher carbon level and at casting pores. Crack propagation occurred anisotropically along the crystallographic planes perpendicular to the applied load ...
High Temperature Tensile Deformation of a Nitrided Fe-1%V Alloy
92
Authors: A. Sakir Bor; MIDDLE EAST TECHNICAL UNIV ANKARA (TURKEY) DEPT OF METALLURGICAL ENGINEERING
A nominally pure Fe-1V alloy with less than 0.01% total impurities, and with homogeneously distributed vanadium nitride precipitates which had been formed by gas nitriding, was used to determine the relations governing the hot tensile deformation behavior. The true stress-strain at various temperatures from 673 to 1073K and strain rates 10-2 to 10-4/s for the alloys are reported. Temperature and strain rate dependence of the strength coefficient, K, obeyed an ...
Superplastic Behavior at High Strain Rates of a Mechanically Alloyed Al- Mg-Li Alloy
92
Authors: K. Higashi; T. Okada; T. Mukai; S. Tanimura; OSAKA PREFECTURE UNIV SAKAI (JAPAN) DEPT OF MECHANICAL ENGINEERING
The possible mechanisms of high strain rate superplasticity were analyzed by studying the tensile behavior of thin rolled sheet specimens of mechanically alloyed IN905XL with ultrafine grained structure (400nm in mean size) at various strain rates and temperatures. Strain rate sensitivity increased from 0.3 to 0.5 with increasing temperature.
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