dent


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dent

1. a toothlike protuberance, esp the tooth of a sprocket or gearwheel
2. Textiles the space between two wires in a loom through which a warp thread is drawn

compressor blade damage

compressor blade damageclick for a larger image
Various types of damages that compressor blades can sustain. Only one or two may take place simultaneously though these have been combined in this illustration.
The various types of damages to compressor blades and their appearances are as follows:
i. Bend. The blade gives the appearance of ragged edges. Smooth repair of the edges or surface in question can be carried out, but the extent of the damage that can be repaired is limited.
ii. Bow. The main source of this type of damage is a foreign object. The blade is bent at the tips and the edges.
iii. Burning. The damage is caused by overheating. The surface of the blade is discolored. If the overheating is severe, there may be some flow of material as well.
iv. Burr. A ragged or turn-out edge is indicative of this type of damage. This takes place during the grinding or cutting operation of the blade at the manufacturing stage.
v. Corrosion. Oxidants and corrosive agents, especially moisture present in the atmosphere, are the main reasons for the corrosion or pitting of the blades. Normally, regular washing is sufficient to prevent it. The blade gives a pitted appearance, and there is some breakdown of the surface of the blade. Also called pitting.
vi. Cracks. Excessive stress from shocks, overloading, or faulty processing of blades during manufacturing can cause cracks and result in their fracture.
vii. Dent. These can be caused by FOD (foreign-object damage) or strikes by dull objects like those in bird strikes. Minor dents can be repaired.
viii. Gall. This type of damage is from the severe rubbing of blades, in which a transfer of metal from one surface to another takes place.
ix. Gouging. The blade gives the appearance of displacing material from its surface, and a tearing effect is prominently visible. This type of damage is from the presence of a comparatively large cutting material or foreign body between moving parts.
x. Growth. The damage manifests itself in the form of elongation of the blades. Growth type of damage takes place because of continued and/or excessive heat and centrifugal force.
xi. Score. Deep scratches are indicative of scoring, which is caused by the presence of chips between surfaces.
xii. Scratch. Narrow and shallow scratches are caused by sand or fine foreign particles as well as by mishandling the blades.
xiii. Pitting. Pitting takes place because of atmospheric corrosion, especially seawater. The surface of the blade shows signs of pitting.
References in periodicals archive ?
Bridie Smurtwaite, prosecuting, said: "They both attended the school, with Mr Dent arriving in the queue behind the defendant.
Edward Dent was born in London in 1790, served his apprenticeship under his cousin, a watch maker called Richard Rippon, and was just 24 when his genius as a designer of chronometers was first recognised in an order from the Admiralty for an astronomical clock.
La dent de lait est le seul organe du corps humain qui nait, qui vit et qui meurt.
Our patented rapid dent and hail detection technology increases productivity, saves time and reduces human error.
Furthermore:"Police said they ordered Dent to put his hands up, but they could only see one.
Dent, of East Portlemouth, Devon, then picked up the bottle.
By combining its two B2C and B2B websites, Dent Wizard can now concentrate its online resources in one place, minimizing audience miscommunication and enhancing digital marketing efforts.
But you can tackle these minor dings and dents in a very ' DIY' way.
But Hewitt offers a far greater threat and Dent is keen to go one better than the last time he faced the Aussie ace at Wimbledon.
It was an appropriate end for Dent, who prefers to serve and get to the net quickly.
Mr Dent, aged 37, a commercial officer for BAE Systems in Riyadh, was killed by a gunman who pulled up alongside his vehicle as he waited at traffic lights in the city on Thursday afternoon.
Jay Dent, 71, and Janet Dent, 63, will remain minimally involved as consultants to the business they founded.