With the rapid development of low-carbon high strength steel, higher requirements are put forward for matching welding consumables. The deposited metals with 0.62–2.32% Cu addition was prepared by tungsten inert gas via metal cored wire. effect element on microstructure and mechanical properties were investigated. multiphase consists bainite, martensite, residual austenite, martensite-austenite...

Recently it was speculated that ultrafine particles may translocate from deposition sites in the lungs to systemic circulation. This could lead to accumulation and potentially adverse reactions in critical organs such as liver, heart, and even brain, consistent with the hypothesis that ultrafine insoluble particles may play a role in the onset of cardiovascular diseases, as growing evidence fro...

Recently, toxicological and epidemiological studies on health effects related to particle exposure suggest that 'ultrafine particles' (particles with an aerodynamic diameter of <100 nm) may cause severe health effects after inhalation. Although the toxicological mechanisms for these effects have not yet been explained, it is apparent that measuring exposures against mass alone is not sufficient...