Defining Forensic Engineering And Failure Analysis

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Failure analysis on a metal is performed by systematic examining, analyzing and testing the failure or flaw, gathering information about the application, component and history, which is further followed by a detailed visual examination. Failure analysis is a part of nondestructive testing which is scientifically known as magnetic particle testing, dye penetrant testing, low magnification, etc. High magnification examination and destructive testing is also sometimes applied like, sectioning the sample for Metallographic micro analysis, Chemical Analysis, Hardness testing, Mechanical testing.

These tests can only performed by a certified welding inspection team in Melbourne.

Macro Examination

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Macroetching is the procedure of etching a sample and evaluating it macro structurally at low magnifications. It is a very frequent technique used for evaluating steel products. There are many different procedures for rating a steel sample by graded series of photographs. The images shows the incidence of certain conditions and is applicable to carbon and low alloy steels.

A number of different etching reagents may also be used depending on the type and process of examination to be applied. You should know that steels react differently to etching reagents because of variations and difference in chemical composition, heat treatment, method of manufacturing and many other factors.

Macro examinations are also performed on a polished and etched cross-section of a welded material. During the testing process, a number of features can be determined including the sequence of weld, weld procedure and qualifications tests. Any defect on the sample can be assessed for compliance with relevant specifications. It can be a slag, lack of weld penetration, porosity, lack of sidewall fusion and poor profile of a weld.

Micro Examination

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Micro examination is performed on specimen either cut to size or mounted in a resin mold. At first they are polished to a fine finish and then etched in an appropriate chemical solution prior to examination on a metallurgical microscope. Micro examination is performed to assess the structure of the material. It is also very common to examine for metallurgical anomalies such as third phase precipitates, excessive grain growth, and various other reasoMicro Examinationns. Many routine tests such as phase counting or grain size determinations are performed in conjunction with micro-examinations.

Forensic engineering and failure analysis of a metal are all high profile examinations, which are conducted to find out even the simplest flaw in a material component.

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Important Questions To Consider While Certifying Your Welders

 

Important Questions To Consider While

If you want to enhance your business profits and establish a reputation in the market you should definitely certify your welders to provide quality services. A team of well trained NDT personnels means great achievement in the field of testing and welding. However, there are several questions that often appear when it comes to getting certified from a certifying board.

So, here are some to make the process easier:

Can an employer choose a particular welding inspector who has previously obtained recognition from Regulatory Authorities?

It is the right of an employer or owner to employ whoever they wish to. They just need to comply with the appropriate standards and regulations proposed by the government. AICIP offers them the opportunity to utilise a nationally recognised, independent certification program to make decisions and assist the responsibilities properly to become a competent person.

Does AICIP insist on mandatory training requirements for a particular field?

No, AICIP has no prerequisites for anyone who wishes to apply for an examination. AICIP has produced a list of competencies for novice inspectors on which the questions are set. It does not have any mandatory requirement.

What is the rough estimate of the examination cost?

The cost of the examination fees is based on the anticipated number of candidates
and conducting the examinations on a national basis. AICIP is independent of all government funding agencies and solely relies on sponsorship to administer the examination.

Will certificates of competency licences be recognised for exemption from AICIP examinations?

AICIP has not been able to confidently state that a person is competent enough based on the wide range and diversity of documents put forward for exemptions. AICIP has not found such a solution for in-service inspectors and thus, has decided that all candidates seeking certification must undertake the examinations.

However, if a person is certified for welding corrosion testing from a foreign country, mutual recognition agreements occur between AICIP and that specific certifying board takes the final decision.

Can a person sit for the Senior Inspector Level without applying for the In-Service Inspector Level?

Candidates must complete the basic In-service Inspector Level before proceeding to the Senior Inspector Level.

When does a re-Certification take effect?

Re-certification becomes a necessity 5 years after examination.

If you want to train your employees to deliver the best services in Melbourne, hire a certified NDT expert who provide all kinds of NDT training.

Advantages Of Some Common NDT Tests

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Non destructive testing methods are generally used for controlling the quality of various materials. These techniques help in detecting the presence of internal or surface flaws, or identifying metallurgical condition of materials without disturbing their integrity or suitability for an application in any way. They can be utilised either for individual investigation or checking a material entirely for production quality regulation.

At present, certain methods of non destructive testing in Melbourne are used extensively by various manufacturing industries. They include radiography, dye penetrant testing, ultrasonic flaw detection, magnetic particle inspection and eddy current electromagnetic induction. The suitability of these procedures are often determined by advantages that each offers.

So let’s take a look at the individual advantages of these methods:

Radiography

One of the reasons why radiographic testing has so high demand is because the results of the tests are presented pictorially. In addition to that, there are also permanent records of the procured information and they can be referred to anytime & anywhere. Radiography is appropriate for nearly any material and very effective for thin sections also.

Dye Penetrant Testing

Another popular NDT method, dye penetrating testing, is preferred particularly for its ability to ensure qualitative analysis. It is quite easy to execute and also highly effective for locating surface-breaking fissures in non-ferrous metals. The technique is also aptly suited for automatic testing.

Ultrasonic Flaw Detection

This commonly used non destructive method proves to be very useful when there is a need for testing thickness & length less than or equal to 30 feet. It can easily determine the type, size and position of defects. Being quite portable, it provides extreme sensitivity whenever necessary and can also be absolutely automated. It needs access to just one side of the surface, and consumables are normally not used.

Magnetic Particle Inspection

MPT is yet another easy-to-use quantitative testing method that can be viewed as well as automated. It also allows for using parts of automatic defect recognition like bars and billets, where a unique camera takes images of the defect.

Eddy Current Electromagnetic Induction

Eddy current testing is capable of determining several conditions of any conducting material, including hardness, permeability, composition, conductivity and defects. The information obtained from the test results are usually in easily comprehensible terms.

The above mentioned information comes in handy when there is a need to determine which NDT method would be ideal for a particular application.