Friday, July 29, 2011

Feed back for NDT Training courses by a participant from Kerala


Dear Sir,
I have completed my NDT level 2 certification course from your institute recently. I attended this course from Kerala. I really appreciate many things during the training period of a few are 
1. The training course is so impressive and quite interesting. The study materials, contents of the training are superb.
2. The trainers are so cool and I could be able to get all my doubts cleared in the class itself with wonderful practical examples.
3. Lab facilities, infrastructure are very good. Conducive environment for learning with great food.


I really enjoyed the course and  would like to thank 'Trinity NDT Institute' for such great training services and for establishing and maintaining the programs with international standards.


with kind regards
Vasanth R Kishore
Palakkad, Kerala

Thursday, July 21, 2011

NDT Level 2 certification courses from 18th August 2011, Bangalore, India

NDT Level 2 certification courses are organized from 18th August 2011 at Bangalore, India. The training programs in August, 2011 are as below

Ultrasonic testing - 18th to 22nd

Magnetic Particle testing - 23rd - 24th

Liquid Penetrant testing - 25th - 26th

Radiographic Interpretation - 27th - 29th

Visual testing - 30th -01st Sept 2011

For more information please visit: www.trinityndt.com or call +91 99009 29439 or email: training@trinityndt.com

Seminar on Advances in Manufacturing Sciences, Technology on 22-24th September 2011, Bangalore, India


The seminar brings together experts from Industries, government, defence, academia, research and end users to examine and discuss new advances in manufacturing sciences and technology that would have maximum impact on end-user industry such as, Aerospace, Automobile, Power sector, Etc.,

In the present global economic scenario, advances in manufacturing sciences and technology are expected to contribute significantly to global economic revival and its sustainability. Keeping this in mind as well as the interests of researchers and the industry, the Bangalore chapter of Indian Institute of Metals (IIM) is organizing a two-day seminar and one day tech mart session entitled ‘Advances in Manufacturing Sciences and Technology’. This seminar provides a forum, where in researchers, metallurgical industry representatives, equipment manufacturers and end-users can meet and discover current trends and future opportunities in the manufacturing sciences and technology.

Some of the proposed speakers are the captains of industry and R& D establishments
namely HAL, BHEL, NTPC, CPRI. HINDALCO, NALCO and DAE.

The Objectives of the seminar are

• To provide a forum to facilitate interaction between the R&D and industry experts together with the captains of industry and metallurgical equipment manufacturers.
• To disseminate current state of art practices and learn about the future trends in the
industry which would make it complete in the future.
• To identify potential research and opportunity areas for researchers and industry.
• To learn about how the Indian companies are standing up to the global challenges of
future.
• To network for better future benefits

Tech mart Sessions

A limited number of 30 minute sessions are available for manufacturers to make product presentations on 241h September 2011. This is a rare opportunity for manufacturers to make presentations about their equipments, processes and capabilities to a large gathering of leaders and decision makers of the Indian industry, senior executives from PSUs,
Government factories, Defence establishments, R&D Establishments and Entrepreneurs from all over India who are potential takers of the technology and exhibits.


Who should participate?

From professional organizations – Engineers, Scientists and researchers from R&D
Organizations, Defence establishments, Research laboratories and Industry.

From academic institutions: Researchers, faculty members and Students.

Entrepreneurs, Engineers and Managers of Industrial enterprises.

Organisers

The Indian Institute of Metal -Bangalore Chapter and American Society of Metals - ASM International- Bangalore chapter (Co-sponsor). The Indian Institute of Metals was conceived in 1945 and currently the membership exceeds 10,000. Some of the nation's best metallurgists and materials engineers have been associated with IIM in various capacities. The Bangalore Chapter is one of the 52 chapters of the IIM.

The Bangalore chapter of IIM, organizes the prestigious Professor Brahm Prakash Memorial and Diamond Jubilee Lecturers, which are delivered by the leaders in the field of metallurgy and materials and which are well received by the metallurgical and the materials community.

Venue:

Bangalore International Exhibition Centre, Tumkur Road, Bangalore, India

Tuesday, July 19, 2011

Nondestuctive Testing - NDT Career Development Tips, Article by Ravi Kumar at Trinity NDT

Being successful in any stream requires proper goals and guidance for reaching the goals is very much vital. Training and certification for personnel development is one of the important challenges to reach the set goals. An article that may help in building successful NDT career is published by me to help aspiring engineers who have dreams of challenging Nondestructive testing and welding inspector careers or any Quality control Engineer for that matter.


Click here to read complete article on Non-destructive Testing - NDT Career Development Tips. Hope you will enjoy reading the article.

Sunday, July 17, 2011

Brief summary of effects of alloying elements on Steel

The following information on brief summary of effects of alloying elements on steel is provided for practicing engineers, NDT trainees and ndtians/technicians and quality control engineers in order to understand and apply these uses for practical related case studies.


Steels are among the most commonly used alloys. The complexity of steel alloys is fairly significant.  Not all effects of the varying elements are included. The following text gives an overview of some of the effects of various alloying elements.  Additional research should be performed prior to making any design or engineering conclusions.

Alloying Elements:
Carbon: has a major effect on steel properties.  Carbon is the primary hardening element in steel.  Hardness and tensile strength increases as carbon content increases up to about 0.85%.  Ductility and weldability decrease with increasing carbon. 
Manganese: 
Is generally beneficial to surface quality especially in resulfurized steels. Manganese contributes to strength and hardness, but less than carbon.  The increase in strength is dependent upon the carbon content.  Increasing the manganese content decreases ductility and weld ability, but less than carbon. Manganese has a significant effect on the harden ability of steel.
 Phosphorus:
Increases strength and hardness and decreases ductility and notch impact toughness of steel.  The adverse effects on ductility and toughness are greater in quenched and tempered higher-carbon steels.  Phosphorous levels are normally controlled to low levels.  Higher phosphorus is specified in low-carbon free-machining steels to improve machinability.
Sulfur:
Decreases ductility and notch impact toughness especially in the transverse direction.  Weld ability decreases with increasing sulfur content.  Sulfur is found primarily in the form of sulfide inclusions.  Sulfur levels are normally controlled to low levels. The only exception is free-machining steels, where sulfur is added to improve machinability.
Silicon:
Is one of the principal deoxidizers used in steelmaking.  Silicon is less effective than manganese in increasing as-rolled strength and hardness. In low-carbon steels, silicon is generally detrimental to surface quality.
Copper: 
In significant amounts is detrimental to hot-working steels.  Copper negatively affects forge welding, but does not seriously affect arc or oxyacetylene welding. Copper can be detrimental to surface quality.  Copper is beneficial to atmospheric corrosion resistance when present in amounts exceeding 0.20%. Weathering steels are sold having greater than 0.20% Copper. 
 Lead: 
Is virtually insoluble in liquid or solid steel.  However, lead is sometimes added to carbon and alloy steels by means of mechanical dispersion during pouring to improve the machinability.
Boron: 
Is added to fully killed steel to improve hardenability. Boron-treated steels are produced to a range of 0.0005 to 0.003%. Whenever boron is substituted in part for other alloys, it should be done only with hardenability in mind because the lowered alloy content may be harmful for some applications.
Boron is a potent alloying element in steel.  A very small amount of boron (about 0.001%) has a strong effect on hardenability.  Boron steels are generally produced within a range of 0.0005 to 0.003%.   Boron is most effective in lower carbon steels. 
Chromium: 
Is commonly added to steel to increase corrosion resistance and oxidation resistance, to increase hardenability, or to improve high-temperature strength.  As a hardening element, Chromium is frequently used with a toughening element such as nickel to produce superior mechanical properties. At higher temperatures, chromium contributes increased strength.  Chromium is as strong carbide former. Complex chromium-iron carbides go into solution in austenite slowly; therefore, sufficient heating time must be allowed for prior to quenching.
Nickel:
Nickel is a ferrite strengthener.  Nickel does not form carbides in steel.  It remains in solution in ferrite, strengthening and toughening the ferrite phase.  Nickel increases the harden ability and impact strength of steels. 
 Molybdenum: 
Increases the hardenability of steel.  Molybdenum may produce secondary hardening during the tempering of quenched steels. It enhances the creep strength of low-alloy steels at elevated temperatures. 
Aluminum: 
Is widely used as a deoxidizer.  Aluminum can control austenite grain growth in reheated steels and is therefore added to control grain size.  Aluminum is the most effective alloy in controlling grain growth prior to quenching. Titanium, zirconium, and vanadium are also valuable grain growth inhibitors, but there carbides are difficult to dissolve into solution in austenite.
Zirconium:
Can be added to killed high-strength low-alloy steels to achieve improvements in inclusion characteristics.  Zirconium causes sulfide inclusions to be globular rather than elongated thus improving toughness and ductility in transverse bending.
Niobium:
(Columbium) increases the yield strength and, to a lesser degree, the tensile strength of carbon steel. The addition of small amounts of Niobium can significantly increase the yield strength of steels.  Niobium can also have a moderate precipitation strengthening effect. Its main contributions are to form precipitates above the transformation temperature, and to retard the recrystallization of austenite, thus promoting a fine-grain microstructure having improved strength and toughness.
Titanium:
Is used to retard grain growth and thus improve toughness. Titanium is also used to achieve improvements in inclusion characteristics.  Titanium causes sulfide inclusions to be globular rather than elongated thus improving toughness and ductility in transverse bending.
Vanadium:
Increases the yield strength and the tensile strength of carbon steel. The addition of small amounts of Vanadium can significantly increase the strength of steels.  Vanadium is one of the primary contributors to precipitation strengthening in micro alloyed steels.   When thermo mechanical processing is properly controlled the ferrite grain size is refined and there is a corresponding increase in toughness.  The impact transition temperature also increases when vanadium is added.
All micro alloy steels contain small concentrations of one or more strong carbide and nitride forming elements.  Vanadium, niobium, and titanium combine preferentially with carbon and/or nitrogen to form a fine dispersion of precipitated particles in the steel matrix.

Selenium:

Selenium is added to improve machinability.

Nitrogen:

Nitrogen has the effect of increasing the austenitic stability of stainless steels and is, as in the case of nickel, an austenite forming element. Yield strength is greatly improved when nitrogen is added to austenitic stainless steels.

Tantalum:

Chemically similar to niobium and has similar effects.

Cobalt:

Cobalt becomes highly radioactive when exposed to the intense radiation of nuclear reactors, and as a result, any stainless steel that is in nuclear service will have a cobalt restriction, usually approximately 0.2% maximum. This problem is emphasized because there is residual cobalt content in the nickel used in producing these steels.
Columbium: Columbium in 18-8 stainless steel has a similar effect to titanium in making the steel immune to harmful carbide precipitation and resultant inter-granular corrosion. Columbium bearing welding electrodes are used in welding both titanium and columbium bearing stainless steels since titanium would be lost in the weld arc whereas columbium is carried over into the weld deposit.
Iron: Iron is the chief element of steel. Normally commercial iron contains other elements present in varying quantities which
produce the required mechanical properties. Iron lacks strength, is very ductile and soft and does not respond to heat treatment to any appreciable degree. It can be hardened somewhat by cold working, but not nearly as much as even a plain low carbon steel.
Tellurium: The addition of approximately .05% tellurium to leaded steel improves machinability over the leaded only steels.

Tuesday, July 12, 2011

NDT Technician job vacancies with Trinity NDT in India


Trinity NDT is an internationally reputed organization head quartered in Peenya Industrial Estate, Bangalore, India.  Now the NDT company looking is for fresh/experienced NDT technicians for recruitment in Bangalore, India. Candidates with Diploma/BE in engineering are eligible to apply. Candidates with post NDT Level II(2) experience are preferred.

Interested candidates can upload their resumes to: careers@trinityndt.com or contact us on +91 99009 29439.

For more information log on to : www.trinityndt.com

Monday, July 4, 2011

Feedback from the NDT Training participant

Certification: As per ASNT SNT-SNT-TC-1A-2006

Course Attended: Ultrasonic testing-UT Level II

Feedback:

Dear Sir,
 

We thank you for providing educative atmosphere and very well maintained infrastructure for theory and practicals provided by you and your personnel. It was a good experience and nice concept training provided by your institute. Hope that we will get more knowledge through more training courses from you in the near future.

Thanks and regards
Girish

From Belgaum, Karnataka, India
On 04th July 2011

Brief introduction to Eddy Current Testing, Applications and Limitations

What are Eddy Currents? What is eddy current inspection?

Eddy current inspection is one of several NDT methods that use the principal of electromagnetism” as the basis for conducting examinations. Eddy currents are created through a process called electromagnetic induction. When alternating current is applied to the conductor, such as copper wire, a magnetic field develops in and around the conductor. If another electrical conductor is brought into the close proximity to this changing magnetic field, current will be induced in this second conductor.

 In brief Eddy currents are induced electrical currents that flow in a circular path.



 Where do we used Eddy Currents?
 • Crack detection   
 • Material thickness  measurements 
 • Coating thickness measurements  
 • Conductivity measurements



What are the advantages of Eddy current testing as NDT method?

• Eddy current inspection is an excellent  NDT Method for detecting surface and near surface discontinuities when the probable defect location and orientation is well known. 

• Sensitive to small cracks and other defects

• Inspection gives immediate results

• Equipment is very portable

• Test probe does not need to contact the part

• Inspects complex shapes and sizes of conductive materials



What are the limitations?

• Only conductive materials can be inspected

• Surface must be accessible to the test probe

• Skill and training required is more extensive than other NDT methods

• Depth of penetration is limited