Method of measuring distribution of crystal grains in metal shee

Details Method of measuring distribution of crystal grains in metal shee Method of measuring distribution of crystal grains in metal shee

1988-11-14

1990-01-16

Chapman, John

Measuring and testing

Vibration

By mechanical waves

73630, 73599, G01N 2900

Patent

active

048935107

ABSTRACT:
In measuring a distribution of crystal grains in metal sheet, an exciting frequency of ultrasonic wave is determined such that a wavelength of the ultrasonic wave propagated in a direction of the sheet thickness of the grains each having an aimed orientation is set at a value of twice the thickness of the sheet multiplied by about integers or about half integers, burst-like ultrasonic pulses having this frequency and including two or more waves are directed into the direction of the sheet thickness by use of an ultrasonic probe moving relatively with a body to be measured, multiple reflected waves generated from the bottom and top faces of the metal sheet upon the reflection from the sheet surface are caused to interfere with each other, the multiple reflected waves, which have interfered with each other, are detected, orientation of the grains in the metal sheet are estimated from the magnitudes in amplitude of the interferent multiple reflected waves thus detected, and the distribution of the grains in orientation in various portions, into which the ultrasonic wave is directed, is detected two-dimensionally.

REFERENCES:
patent: 3929006 (1975-12-01), Boggs et al.
patent: 4563898 (1986-01-01), Kanda et al.

Affiliated with

Also associated with

Rating

Method of measuring distribution of crystal grains in metal shee does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of measuring distribution of crystal grains in metal shee, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of measuring distribution of crystal grains in metal shee will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1327757