By Liviu Marsavina
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Additional resources for Advances in strength of materials : selected peer reviewed papers from the Strength of Materials Laboratory at 85 years, 21-22 November 2008, Timisoara, Romania
Moreover, following an example of coercitive field variation varying with size granulation, one can see that this has the smallest value in case of amorphous alloys and, in nanometric sizes domain, this decreases as the size of the crystals diminish according with the d6 law, in contrast with the big size crystals domain when the variation law is 1/d. (figure 2). 2 Variation of the coercitive field with the grain size  In the last decades were developed many amorphous and nanocrystalline ferromagnetic families alloys, the most well know being the Fe81B13Si4C2, Fe81B13Si6 amourphous alloys respectively the nanocrystalline alloys familiar under the commercial name of Finemet (Fe-Cu-M-B-Si), Nanoperm (Fe-M-B), or Hitperm (Fe-Co-M-B-Cu) where M = Zr, Hf, Nb, Mo,V.
The view of bridge, collapsed into the Mississippi River, 1st August 2007  Non-destructive testing Intensive use of non-destructive testing has started by introduction of radiography for material testing in middle twenties of the last century. Radiography testing, capable to document detected defect, was strict requirement when welding procedures replaced riveting in joining responsible structural components. Uncertain quality of welded joint and unpleasant view, both depended on welders knowledge and skill, pressed the customers and producers to define minimum quality level for welded structures, and radiography, that time the only available non-destructive testing (NDT) method for reliable detection of eventual defects was applied.
S - T e m p . : 2 5 ° O p e r a t i o n s : S m o o t h 2 . 5 0 0 | S m o o t h 2 . 5 0 0 | S m o o t h 2 . 5 0 0 | S m o o t h 2 . 5 0 0 | S m o o t h 2 . 5 0 0 | S m o o t h 2 . r a w - T y p e : 2 T h / T h l o c k e d - S t a r t : 1 0 . 0 0 0 ° - E n d : 7 0 . 0 0 0 ° - S te p : 0 . 0 5 0 ° - S t e p t i m e : 3 . s - T e m p . 4 The X-ray pattern diffraction for Fe70 Cr4 Ni1 Ga4 P13 Si5 C3 rod Cross-section of a bulk rod was etched in a solution of 1% hydrofluoric acid and was examined by optical microscopy (figure 5) and one can observe a smooth and homogeneous surface without spots of corrosion.
Advances in strength of materials : selected peer reviewed papers from the Strength of Materials Laboratory at 85 years, 21-22 November 2008, Timisoara, Romania by Liviu Marsavina