Andere Kunden interessierten sich auch für
![Spheriodization of the Grain Boundary Precipitates in Fe-Ta-Cr Alloys]( "Spheriodization of the Grain Boundary Precipitates in Fe-Ta-Cr Alloys")
Spheriodization of the Grain Boundary Precipitates in Fe-Ta-Cr Alloys60,99 €![The Effect of Elevated Temperature on the Fretting Fatigue Behavior of Nickel Alloy IN-100]( "The Effect of Elevated Temperature on the Fretting Fatigue Behavior of Nickel Alloy IN-100")
The Effect of Elevated Temperature on the Fretting Fatigue Behavior of Nickel Alloy IN-10061,99 €![Phase Transformation Characteristics and Creep Properties of a Laves Phase Strengthened Fe-Ta-Cr-Mo Alloy]( "Phase Transformation Characteristics and Creep Properties of a Laves Phase Strengthened Fe-Ta-Cr-Mo Alloy")
Phase Transformation Characteristics and Creep Properties of a Laves Phase Strengthened Fe-Ta-Cr-Mo Alloy63,99 €![Fretting Fatigue Behavior of a Titanium Alloy Ti-6AL-4V at Elevated Temperature]( "Fretting Fatigue Behavior of a Titanium Alloy Ti-6AL-4V at Elevated Temperature")
Fretting Fatigue Behavior of a Titanium Alloy Ti-6AL-4V at Elevated Temperature63,99 €![High Temperature Degradation Mechanisms in Polymer Matrix Composites]( "High Temperature Degradation Mechanisms in Polymer Matrix Composites")
High Temperature Degradation Mechanisms in Polymer Matrix Composites63,99 €![Photogrammetric Measurement of Recession Rates of Low Temperature Ablators Subjected to High Speed Flow]( "Photogrammetric Measurement of Recession Rates of Low Temperature Ablators Subjected to High Speed Flow")
Photogrammetric Measurement of Recession Rates of Low Temperature Ablators Subjected to High Speed Flow63,99 €![Spectral and Temporal Characterization of High-Temperature Events]( "Spectral and Temporal Characterization of High-Temperature Events")
Spectral and Temporal Characterization of High-Temperature Events60,99 €
A new high-temperature-strength, high-conductivity Cu-Cr-Nb alloy with a CrNb ratio of 2:1 was developed to achieve improved performance and durability. The Cu-8 Cr4 Nb alloy studied has demonstrated remarkable thermal and microstructural stability after long exposures at temperatures up to 0.98 T(sub m). This stability was mainly attributed to the slow coarsening kinetics of the Cr2Nb precipitates present in the alloy. At all temperatures, the microstructure consists of a bimodal and sometimes trimodal distribution of strengthening Cr2Nb precipitates, depending on precipitation condition, i.e. from liquid or solid solution, and cooling rates. These precipitates remain in the same size range, i.e. large precipitates of approximately I pm, and small precipitates less dm 300 nm, and effectively pin the grain boundaries thus retaining a fine grain size of 2.7 micro-m after 100 h at 1323 K. (A relatively small number of Cr-rich and Nb-rich particles were also present.) This grain boundary pinning and sluggish coarsening of Cr2Nb particles explain the retention of good mechanical properties after prolonged holding at very high temperatures, e.g., 75% of the original hardness after aging for 100 h at 1273 K. Application of LSW-based coarsening models indicated that the coarsening kinetics of the large precipitates are most likely governed by grain boundary diffsion and, to a lesser extent, volume diffusion mechanisms.
Hinweis: Dieser Artikel kann nur an eine deutsche Lieferadresse ausgeliefert werden.
Hinweis: Dieser Artikel kann nur an eine deutsche Lieferadresse ausgeliefert werden.