Fig.1

CFM56-7B engine blade category and number

Fig.2

Different damage morphologies of aero engine blades

Fig.3

Various types of fan blade damage［32］

Table 1

Damage of aero engine fan blades

Fig.4

Regional division and common damage of compressor blades

Fig.5

Fatigue failure positions of compressor blades［38］

Fig.6

Corrosion morphology of compressor blades［48］

Table 2

Blade corrosion damage［50］

Fig.7

Appearance of blades after “bird strike”［55］

Fig.8

Appearance of damaged block at inlet edge［55］

Fig.9

Damage morphology of blades caused by finesand and gravel impact［55］

Table 3

Proportion of different damage types in compressor［56］

Fig.10

High pressure blade damage［57］

Fig.11

Damage and repair of compressor blade［58］

Fig.12

Replace blade of integral disk with linear friction welding［58］

Table 4

PW4000⁃compressor stage 5 blade inspection and repair scheme

Fig.13

Maintenance steps of blades of integral disk

Fig.14

Different damage of integral disk blade［69］

Fig.15

Repair of blade damage by electron beam patch welding［69］

Fig.16

Replace damaged blade of integral disk［69］

Table 5

Damage types of high and low pressure turbine blades［5］

Fig.17

Typical oxidative damage［78］

Fig.18

Morphology of coating shedding on turbine blades［82］

Fig.19

Ablative morphology of high pressure turbine blades［82］

Fig.20

Cracks in high pressure turbine blades［82］

Fig.21

Corrosion of high pressure turbine rotor blades［82］

Fig.22

Crack morphology and initial melting morphology of an equiaxed cast turbine blade after overtemperature failure［89］

Table 6

Damage forms and causes of turbine blades［90］

Fig.23

Steps of turbine blade repair［58］

Fig.24

Maintenance process of stator blades of high pressure turbines［110］

Fig.25

In situ grinding maintenance model of blades［114］

Fig.26

Partition of blade in maintenance manual

Fig.27

Maintenance shape requirements of fan blades［116］

Fig.28

German WOLF grinding equipment

Fig.29

In situ maintenance instrument in promotion

Fig.30

In situ grinding mechanical structures

Fig.31

An in situ maintenance system able to be operated remotely［123］

Fig.32

Micro intelligent maintenance equipment

Fig.33

Laser repair and grinding repair［125］

Fig.34

Roll strengthening of blades［127］

Fig.35

Ultrasonic filing maintenance equipment［131］

Fig.36

Different repair shapes［132］

Fig.37

Blade damage impact test［133］

Fig.38

Adaptive processing technology route［143］

Fig.39

Aero engine blade remanufacturing repair process［12］

Fig.40

Adaptive numerical control machining for restoring integral disk blade profile［69］