Newly appearing technical articles - March 2015

ABSTRACTS OF LITERATURE


The articles listed below are from recent technical journals and may be of interest to members. Copies are available from Margaret O’Malley at IST Headquarters.


DeFord, R., Engineering Manager Mid-West Spring & Stamping, USA "All Things Springs”, Wire Forming Technology International , Winter 2015, p 16

Stranded Wire Helical Springs

Once in a while I'll get the question about the creature known as a stranded wire spring. For those who may not know what that is, it's a standard helical compression spring made from a twisted set of smaller wires instead of a single homogenous wire cross-section.

 

O'Malley, M., Membership Services Manager Institute of Spring Technology (IST), "Technically Speaking", Wire Forming Technology International , Winter 2015, p 44

Flaw/Crack Detection for Springs

There are times when the Institute of Spring Technology (IST) is asked to carry out tests that go beyond those we offer to the spring industry as a matter of course.
In the majority of such cases, we well help clients find another laboratory that can carry out the testing for them. (..)

However, there is one particular type of testing that IST gets asked about on a fairly regular basis, and variably, our response is that - in the vast majoriy of cases - such testing is totally inappropriate for springs. The testing in question is eddy current flaw detection.

 

Wright R. N., Dr., "The Strength of Steel", Wire Forming Technology International , Winter 2015, p 50

Annealing of Steel - Part 5 Stress-Relief Annealing

To understand the need for and process of stress-relief annealing, we need to consider three preliminary topics, namely residual stress, creep and stress relaxation. Residual stress arises any time there is nonuniform plastic flow or working. Nonuniform working occurs in most metalworking and metal cutting operations, simply because the interaction with the working tools including frictional contact, inhibits or exaggerates the flow in various locations in the workpiece.

 

Vander Fort, G. F., FASM, Struers Inc. (Consultant), Cleveland, "UNDERSTANDING AND MEASURING DECARBURIZATION", ADVANCED MATERIALS & PROCESSES, FEBRUARY 2015, pp 22-27

Understanding the forces behind decarburization is the first step toward minimizing its detrimental effects.

Decarburization is detrimental to the wear life and fatigue life of steel heat-treated components. This article explores some factors that cause decarburization while concentrating on its measurement.

 


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