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2017-01-01
This micrograph (magnified √ó 500), taken by an optical microscope, shows multi-scaled crystalline grains at the interface between a martensitic weld metal (upper left) and a Grade 91 steel (bottom right). Weld metal solidified from the molten steel liquid and grew into coarse columnar crystals...
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2016-01-01
This micrograph, taken by a scanning electron microscope, shows the fracture surface (magnified × 1000) of a failed pressure vessel component joint used in fossil fired power plants. It presents the history of this failure. Industrial incidents of the welded structure components can cause huge...
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