Microstructural refinement through inoculation of type 7020 Al–Zn–Mg alloy welds and its effect on hot cracking and tensile properties

Proposta de roteiro para a determinação das variáveis de soldagem do Processo TIG pulsado aplicado à soldagem de chapas finas

“…As vantagens relatadas para este método incluem o maior controle sobre as características dimensionais do cordão de solda [8,9], maior tolerância às variações na dissipação de calor [10], menor aporte de calor [6,11,12], redução de tensões residuais e distorções da peça [11,13] e maior controle sobre a poça de fusão [7], princi-palmente em posições de soldagem desfavoráveis. Já do ponto de vista metalúrgico, as vantagens relatadas referem-se ao refino de grãos obtido na zona fundida [14], redução da largura da ZAC [15] e controle de segregação [16].…”

Review of Aluminum Alloy Development for Wire Arc Additive Manufacturing

“…Microalloying of the wire chemistry for arc fusion was demonstrated numerous times in the literature. Traditional fusion welding with 7000-alloys was enabled with additions of Sc and Zr [166,167]. CET and the related grain refinement suppressed the cracking susceptibility.…”

The Assessment of Modification of High-Zinc Aluminium Alloy

“…The Al-Zn alloys are presently the frequent object of scientific reports, which recommend their multiple advantages and possibilities of application. These materials alloyed with various elements exhibit good mechanical and plastic properties, which can be controlled by the suitable heat treatment [1][2][3][4][5][6][7][8]. They found a wide field of application as structural materials in aircraft and automotive industry, as well as in the railway sector; they are applied for bridge and overpass girders, armours of military vehicles, cryogenic pressure vessels etc.…”

“…They found a wide field of application as structural materials in aircraft and automotive industry, as well as in the railway sector; they are applied for bridge and overpass girders, armours of military vehicles, cryogenic pressure vessels etc. [7,8]. Another important factor contributing to the attractiveness of AlZn alloys is their good weldability after being enriched with magnesium addition [8,9].…”

“…Another important factor contributing to the attractiveness of AlZn alloys is their good weldability after being enriched with magnesium addition [8,9]. Unlike other precipitation-hardened aluminium alloys, the Al-Zn alloys are not sensitive to the cooling rate during the solution heat treatment [7]. The ageing process can be carried out either in ambient temperature, or in elevated temperature exceeding 373 K. The aluminium-zinc alloys can be divided into two groups: the low-zinc aluminium alloys containing up to 10 wt% of Zn and the high-zinc aluminium alloys with Zn content 10 -30 wt%.…”