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2. Whisker (metallurgy) - Wikipedia

   en.wikipedia.org/wiki/Whisker_(metallurgy)

   The possible increase in the use of pure tin in electronics due to the RoHS directive drove JEDEC and IPC to release a tin whisker acceptance testing standard and mitigation practices guideline intended to help manufacturers reduce the risk of tin whiskers in lead-free products. [13]

3. Tin - Wikipedia

   en.wikipedia.org/wiki/Tin

   It is stable below 13.2 °C (55.8 °F) and is brittle. α-tin has a diamond cubic crystal structure, as do diamond and silicon. α-tin does not have metallic properties because its atoms form a covalent structure in which electrons cannot move freely. α-tin is a dull-gray powdery material with no common uses other than specialized ...

4. Epstein frame - Wikipedia

   en.wikipedia.org/wiki/Epstein_frame

   is the average magnetic path length = 0.94 (constant value) m {\displaystyle m~} is the mass of the sample in kilograms If all conditions are as defined in the standard, the standard deviation of the reproducibility of the values is not greater than 1.5% up to 1.5 T [ clarification needed ] for non-oriented electrical steel and up to 1.7 T for ...

5. Hardnesses of the elements (data page) - Wikipedia

   en.wikipedia.org/wiki/Hardnesses_of_the_elements...

   Download QR code; Print/export Download as PDF; Printable version; In other projects ... Vickers hardness test; Brinell scale This page was last ...

6. Magnetic particle inspection - Wikipedia

   en.wikipedia.org/wiki/Magnetic_particle_inspection

   Indirect magnetization occurs when no electric current is passed through the test object, but a magnetic field is applied from an outside source. The presence of a surface or subsurface discontinuity in the material allows the magnetic flux to leak, since air cannot support as much magnetic field per unit volume as metals.

7. Eddy-current testing - Wikipedia

   en.wikipedia.org/wiki/Eddy-current_testing

   Variations in the electrical conductivity and magnetic permeability of the test object, and the presence of defects causes a change in eddy current and a corresponding change in phase and amplitude that can be detected by measuring the impedance changes in the coil, which is a telltale sign of the presence of defects. [5]

8. Meissner effect - Wikipedia

   en.wikipedia.org/wiki/Meissner_effect

   The samples, in the presence of an applied magnetic field, were cooled below their superconducting transition temperature, whereupon the samples cancelled nearly all interior magnetic fields. They detected this effect only indirectly because the magnetic flux is conserved by a superconductor: when the interior field decreases, the exterior ...

9. Reinsch test - Wikipedia

   en.wikipedia.org/wiki/Reinsch_test

   Download QR code; Print/export ... The Reinsch test is an initial indicator to detect the presence of one or more of the following heavy metals in a biological sample