Tangalooma Villas

Apr
14

Types of Non-Destructive Testing

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The tensile-strength test is inherently futile; during the process of fostering material, the sample is wasted. Although this is not a problem when a decent supply of the material exists, nondestructive procedures are better for materials that are dear or complex to make up or that have been constructed into finished or semicompleted items.

Liquids

One common nondestructive test, used to see surface cracks and flaws in metals, uses a penetrating fluid, either visibly dyed or fluorescent. After being painted on the surface of the metal sample and left to fill into any surface breaks, the fluid is rubbed away, leaving brightly visible cracks and flaws. Another such test, used for nonmetals, requires an electrically charged liquid smeared on the nonmetal surface. After superfluous liquid is cleaned off, a dry powder of opposite charge is sprayed onto the sample and draws to the breaks. Neither of these processes, however, can locate internal imperfections.

Radiation

Internal, as well as external weaknesses, can be identified through the use of X-ray or gamma-ray machines in which the radiation passes through the material and impresses on an appropriate photographic film. Under some circumstances, it may be possible to nominate the X rays toward a particular part within the sample, allowing a 3D view of the flaw shape as well as its site.

Sound

Ultrasonic inspection of areas requires transmission of sound waves higher than human hearing range through the sample. In the reflection process, a sound wave is sent over one part of the piece, reflected off the other area, then signalled onto a receiver situated at the starting side. When locating a mark or weak point in the test sample, the signal is reflected and its traveling time adapted. The actual delay then becomes a measure of the location of the mark; a map of the material can be formed to locate the area and dimensions of the marks. With the through-transmission technique, the transmitter and receiver need to be placed on opposite areas of the subject; delays in the signal of sound waves are studied to isolate and measure marks. Often a water medium is utilized through the use of which transmitter, sample, and receiver will be immersed.

Magnetism

As the magnetic aspects of a material are strongly reflected by its overall structure, magnetic techniques are sometimes used to reveal the placement and relative geometry of failures and imperfections. In magnetic testing, an object is used that holds a sizeable coil of wire through which flows a steady alternating current (primary coil). Located inside this initial wire is a shorter coil (the secondary coil), to which is connected an electrical measuring tool. The steady current in the first coil causes current to flow through the secondary coil by way of the process of induction. When an iron sample is inserted into the secondary coil, acute changes in the secondary current can implicate defects in the piece. This technique only locates differentiations in areas on the length of a sample and cannot locate long or continuous marks very readily. A parallel technique, utilizing eddy currents induced by a primary coil, also should be employed to find marks and weaknesses. A steady current is induced within the test sample. Weaknesses that are found in the transmission of the current change resistance of the test material; this adaptation will then be measured with the correct processes.

Infrared

Infrared techniques also have been utilized to find material continuity in complex structural items. While testing the value of adhesive bonds in the sandwich core and facing sheets in a usual sandwich construction object like plywood, for example, heat is used against the surface of the sandwich skin material. In the case that bond lines are found to be continuous, those core materials allow a heat depression within the surface material, and the local temperatures of the skin then appear steadily on these bond lines. In the case where a bond line is inadequate, disappears, or erroneous, however, temperature should not change. Infrared photography of the front does indicate the situation and area of the marked adhesive. Another such process employs thermal coatings that change appearance when reaching a devised heat.

In conclusion, nondestructive test methods also are now being sought to permit a total understanding of the mechanical characteristics of a test piece. Ultrasonics and thermal methods are the most trustworthy in this area.

Looking for NDT Brisbane? For Brisbane non-destructive testing, contact Just Inspections today.

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Dec
21

Good Reasons to Pay Your Suppliers on Time

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Many small businesses spend far too much time on debt collection rather than their core business. Over the last 2-3 months I’ve noticed an increasing lag in payment cycles.

If you are in any sort of operation that uses small businesses as service providers or product suppliers it’s well worth your while to pay your bills on time and completely ignore to some “clever” accountants mantra of not paying until the second reminder. Guess what? People are human and they will pay back and pay forward. One way or the other you will pay in the end for screwing around your suppliers.

Here’s why:

1. If you pay on time you will get much better service. I know with my clients, the one’s who pay on time or early get the best service, day or night 365 days per year. These are A-Class clients. They pay on time or early, don’t bitch about the price, and as a result get excellent service and great value for money. They respect me, and I respect them. We both win.

2. If you don’t pay on time you reputation is on the line. Small business owners love to gossip. They slag off any customers who pay late. And with the Internet so freely available, your reputation can become crap overnight with one blog post. This leads into …

3. If you don’t pay on time, you can end up paying a premium. The current cost of money is about 1.5% per month. If your payment reputation is shite, than expect to pay at least 10-15 % more than if it were good or unknown. In some cases bad payers can be locked out of they supply chain completely and have to spend enormous amounts of time to find a new supplier.

With existing suppliers, if you screw them around, they will either add 10% to their next quote, or refer you to a lower-class competitor - hoping to send them broke because you don’t pay when due.

4. If you pay on time your staff don’t get harassed by debt collectors from your supplier’s accounts departments. This is a big source of staff burn-out. If you pay on time your staff won’t have to make up excuses for late payment and may actually start to enjoy their jobs.

In summary, if you want good service, good products, happier staff and ongoing loyalty, pay on time or before time and ignore your accountant’s advice.

What do you think? Why do you like early payment or not?

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Article supplied by Brisbane web designer and SEO Training.

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Dec
16

Laser Hair Removal Brisbane

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Brisbane Laser Hair Removal

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