Ingénierie microstructurelle des surfaces : applications aux matériaux nanocristallins pour l’aéronautique et le spatial

© Safran _ T-45 Goshawk

Figure 1: Electron micrographs of (a) a coarse-grained metal [1] and (b) Nanovate nanocrystalline material (left) and magnified x100,000 (right). A single grain of the nanocrystalline metal is outlined.

Figure 2: Taber Wear Index of electrodeposited Ni as 
a function of average grain size [12].

Figure 3: Optical micrographs of cross-sections of (a) Nanovate CR and (b) EHC electrodeposits. Coatings appear in the left side of the figures.

Figure 4: ASTM B537 ranking as a function of exposure time for Nanovate CR and EHC.

Figure 5: S-N curves for bare, Nanovate CR- and EHC-coated (a) 4340 steel (1790 – 1930 MPa UTS) with rotating beam test configuration, and (b) 4340 steel (1240-1380 MPa UTS).

Figure 6: Schematic of Integran’s CFRP tooling approach, depicting a CFRP tool section coated with Nanovate NV.

Figure 7: CTE of Nanovate NV compared to CFRP and tool materials [39].

Figure 8: Hardness of Nanovate NV compared to conventional low CTE metals and CFRP.

Figure 9: Scanning electron micrographs of cross-sections the coated CFRP after thermal cycling.

Figure 10: Schematic of the process to create Nanovate NP nanocrystalline metal-polymer hybrid components.

Figure 11: Performance benefits of Nanovate NP hybrid components compared to polymer (plastic) alone, including (a) tensile strength, (b) flexural modulus and (c) impact resistance [36].

Figure 12: Stiffness storage modulus at elevated temperature of Nanovate NP hybrid components compared to polymer 
(plastic) alone.

Figure 13: Images of (a) CFRP and (b) Nanovate NS-coated CFRP following erosion tests.

Table 1: Typical hardness achieved with Integran’s Nanovate nanocrystalline materials.

Table 2: Comparison of Nanovate CR and EHC Processes.

Table 3: Comparison of Nanovate CR and EHC Properties.

Table 4: Summary of the properties of Nanovate NV-coated CFRP, CFRP and Invar [37,38,39].