Ultrasonic detection of cracks in wheel set axles

ND T Abstracts scmt,llat,on counter as one of a set of feastbd,ty stud,es on the practical apphcatton of cosmic rays to inspection o f large structural matanals It is concluded from the results o f a model analysis that the cosmic-ray mtensmes are governed by the platform depth and soil cover thickness o f the stations The bulk densmes of the spaces above the platforms are also esumated from these measurements 37556 Temple, J.A_G E u r o p e a n d e v e l o p m e n t s in t h e o r e t t c a l m o d e l l i n g o f NDE for pipework Internauonal Journal o f Pressure V e s s e l s and P t p m g , Vol 28, No. 1-5, pp_ 227-267 (1987) Ultrasonic. non-destructwe examinations are used to detect and size crack-hke defects m a variety of structures such as radway ra~ls, bndges. pressure vessels and pipework_ Such mspecuons are carefully designed to detect cracks which, if not repaired, could lead to loss of the component_ If the response from a defect can be calculated then =t is possible to exarmne the respect=on strategies and procedures and to demonstrate that they a ~ adequate for the purpose for which they are intended A survey ,s given of various problems tackled by European modellers of NDT. concentrat,ng on areas which have not been recendy rev=ewed elsewhere Emphasis is placed on physical features of defects, such as defect roughness, material ,ngress. the effects of compressive stress, the effects of crack size. and the lmphcauons of vanauon =n the rehabthty of ultrasomc testing due to these effects for structural integrity 37445 Mattx Incl O f f s e t c r a c k d e t e c t i o n m e t h o d for rail h e a d s - u s e s s c a t t e r e d ultrasonic waves projected onto the understde faces and detects reflections E u r o p e a n Patent No 204,143 (10 Dec. 1986)

37279 Anon Swinden Laboratories open up for testing and inspection Steel T t m e s , Vol. 215, No. 8, pp. 410-411 ( A u g , 1987) Bnush Steel Corporauon's Swmden Laboratortes opened up thetr doors to the pubhc recendy and showed o f f the large breadth o f their expanlse m the steel industry. One o f the many areas where brand new developments were on show was testing and inspecuon For msmnce two the the projects m this sector which have only just been pubhclsed are a raJI dimension measurement system at BSC Cumbna Track Products and a mould laper gauge for conunuous casting moulds. This article expla,ns how these systems work 37183 Hewttt, P Liteslice profile m e a s u r e m e n t s y s t e m a p r o d u c t o f A u s t r a l i a n i n d u s t r y s u p p o r t e d by G o v e r n m e n t Nondestructive T e s t m g - Australia, Vol 23. No 6, pp 151-152 ( N o v / D e c 1986) Track maintenance to overcome rail weal" is a major factor m railroad cost. However, until recendy, the only way to measure rail wear was to use a hand-held mechanical pantograph placed around the rad Obtaining data for comprehensive railroad maintenance planning was not economically v,able This paper describes an opto-electronlc device called LITESLICE which is able to provide accurate information raptdly and automatically without interfering with other raul operatmns 37050 Szelazek, J U l t r a s o n i c d e t e c t i o n o f c r a c k s in w h e e l s e t a x l e s N D T International, Vol. 20, No 3, pp 177-180 (3 Jun 1987) This paper presents a means of testing rmlway carnage wheel sets with ultrasonic probes mounted on the cyl,ndncal surface of the axle between the heanng and the wheel disc. The results of tests show that the method prov,des a consistent coupling efficiency, us,ng hqmd coupling, while the probe is rotated on the smooth cyhndncal surface of the axle collar

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