Location

La Jolla, CA

Start Date

1-1-1987 12:00 AM

Description

Mechanical properties of metals depend strongly on the grain size. The yield strength, for example, is generally inversely proportional to the square root of the grain diameter (Hall-Petch equation) [1]. For this reason, steel and other industries spend a great deal of effort in measuring and ensuring the desired grain size. In a common practical technique, samples are cut from the actual product and the number of grains per unit area are measured by optical methods. This method is time consuming and a hundred-percent inspection is impossible because the delay would affect the product’s net output. Thus, there is an interest to develop a nondestructive, on-line technique capable of rapid measurement of grain size.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

6B

Chapter

Chapter 8: Materials Characterization

Section

Ferromagnetic Materials

Pages

1641-1650

DOI

10.1007/978-1-4613-1893-4_185

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

On-Line Inspection of Ferromagnetic Materials Using Magnetic NDE Methods

La Jolla, CA

Mechanical properties of metals depend strongly on the grain size. The yield strength, for example, is generally inversely proportional to the square root of the grain diameter (Hall-Petch equation) [1]. For this reason, steel and other industries spend a great deal of effort in measuring and ensuring the desired grain size. In a common practical technique, samples are cut from the actual product and the number of grains per unit area are measured by optical methods. This method is time consuming and a hundred-percent inspection is impossible because the delay would affect the product’s net output. Thus, there is an interest to develop a nondestructive, on-line technique capable of rapid measurement of grain size.