摘要:

A method which employs both longitudinal wave and mode-converted shear wave scattered from a flaw is used to reconstruct the image of the flaw. Some experimental data has been collected on a circular cylinder.

ISSN:0278-0895    

DOI:10.1080/10589758708952931

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

Non metallic inclusions in steel were extracted by means of an organic compounds film, type epoxy. The analyzed- steel surface was previously etched with Br/CH3OH solution, so that the inclusions were in relief, then it was covered by an organic film. The inclusions were then extracted and the microstructure copied. They were then observed through optical microscopy and scanning electron microscopy. The conductivity of the sample was obtained by a metallic deposit on the inclusions and the phases that comprise it were studied by energy dispersive analysis X Rays(EDAX) associated to SEM. The same formalism as the one used for thin foil was applied. Evaluations of comparative benefits were carried out regarding precision and speed compared to other nondestructive and destructive techniques common in the characterization of inclusions in steel

ISSN:0278-0895    

DOI:10.1080/10589758708952932

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

A new method of monitoring the cure of resins in paper laminates is described. Samples of high pressure decorative phenolic laminates, with degrees of cure ranging from 75 to 100 per cent, have been scanned with 3 cm microwaves. It has been shown that the amplitude of through-transmitted waves decreases linearly with increasing cure, the correlation being such that the degree of cure of a given sample should be obtainable virtually instantaneously to a standard deviation of ± 2 per cent.

ISSN:0278-0895    

DOI:10.1080/10589758708952933

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

ISSN:0278-0895    

DOI:10.1080/10589758708952934

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor