Article: Heavy metal: a weld need not be the weakest link in the track structure.(ENGINEERING)

Article: Effects of heavy axle loads on head-repair welds at ...
Railway Track and Structures;  July 1, 2009 ;     700+ words ... ... introduced thermite railhead repair welds (RHRW) in response ... whereas standard thermite welds average about 0.6 ... inch-depth head repair welds (OW-1 group) installed ... full-head depth head repair welds (OW-2 group) and ...

Article: Impact of FAST on track technology and safety: testing performed ...
Railway Track and Structures;  August 1, 2003 ;     700+ words ... ... as identifying potential problems before they could occur in revenue service. Today, special trackwork, ties, rails, thermite welds, subgrade and a two-span steel bridge are being tested under 315,000-pound cars in a 75-car train (Figure 1 ...

Article: NIST SAYS "MORE ATTENTION MUST BE PAID TO REPAIR ...
Journal of Research of the National Institute of Standards and Technology;  July 1, 2001 ;     606 words ... ... variations that occur during the welding repair which "can cause significant degradation of the welded-joint zone." Repair welds are usually short, so their temperature fields are more complex than long welds. The degradation is most severe at weld ...

Article: Development and evaluation of improved rail welding and weld ...
Railway Track and Structures;  October 1, 2008 ;     700+ words ... ... thermite railhead repair welds. TTCI tested ... specification for thermite welds, which included ... of the railhead repair welds from both manufacturers ... full-section thermite welds. This may be ... those of standard thermite welds. TTCI is looking ... thermite ...

Article: Thermite weld evaluations and developments: railroads, ...
Railway Track and Structures;  December 1, 2002 ;     700+ words ... ... was a failure rate of 89 percent with thermite welds after 159 mgt (this failure rate is ... stronger, cleaner and more-consistent thermite welds. However, thermite weld failures ... fractures) during that period were thermite welds, which led to an industry desire for ...

Article: Wide-gap welds offer railroads potential savings.
Railway Track and Structures;  August 1, 1999 ;     700+ words ... ... chemical reaction. When properly made, thermite welds can give very good performance, and ... machines cannot be used as flexibly as thermite welds and are thus more suitable for situations ... location. The main drawbacks with thermite welds are they are fairly slow to make ...

Article: Advances in rail welding: AAR, with the help of suppliers and ...
Railway Track and Structures;  February 1, 2004 ;     700+ words ... ... were desired in the performance of thermite welds used in field welding. Since that ... time demands and available resources. Thermite welds Besides working with Orgo-Thermit ... only include laboratory testing of thermite welds, but collaboration on possible improvements ...