Microstructure refinement and hardening of Ag–20wt.%Cu alloy by rapid solidification

Lussana, D.; Castellero, Alberto; Vedani, Maurizio; Ripamonti, Diego; Angella, Giuliano; Baricco, Marcello

doi:10.1016/j.jallcom.2014.01.054

Cited by 7 publications

(1 citation statement)

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“…Therefore, it is essential to further the laser surface strengthening technique on magnesium alloys. As is known, with more rapid cooling rate, some especial rapid solidification microstructure may be obtained [8]. Nevertheless, previous laser surface strengthening studies were carried out in aircooling condition [9,10].…”

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Surface Strengthening Behavior of Magnesium Alloy with Laser Thermal Loading Under Rapid Cooling

Chen

Wang

et al. 2018

Strength Mater

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Ïîâåðõíîñòíîå óïðî÷íåíèå ìàãíèåâîãî ñïëàâà ïóòåì ëàçåðíîé òåðìîîáðàáîòêè â óñëîâèÿõ áûñòðîãî îõëàaeäåíèÿ ß. Ê. Ãå à , Ê. ×åí à , Â. Ê. Âàíã á , Ñ. Ãóî á à Êîëëåäae ìàòåðèàëîâåäåíèÿ è èíaeèíèðèíãà, Òàéþàíüñêèé óíèâåðñèòåò íàóêè è òåõíèêè, Òàéþàíü, ïðîâèíöèÿ Øàíüñè, Êèòàé á Êîëëåäae ìàòåðèàëîâåäåíèÿ è èíaeèíèðèíãà, Òàéþàíüñêèé òåõíîëîãè÷åñêèé óíèâåðñèòåò, Òàéþàíü, ïðîâèíöèÿ Øàíüñè, Êèòàé Âûïîëíåíî ëàçåðíîå ïîâåðõíîñòíîå óïðî÷íåíèå îáðàçöà èç ìàãíèåâîãî ñïëàâà AZ31B ñ åãî îäíîâðåìåííûì áûñòðûì îõëàaeäåíèåì â aeèäêîì àçîòå. Èññëåäîâàíû õàðàêòåð è ìåõàíèçì ïîâåðõíîñòíîãî óïðî÷íåíèÿ. Áëàãîäàðÿ ìåõàíèçìàì óìåíüøåíèÿ ðàçìåðîâ çåðåí è âîçíèêíîâåíèÿ òâåðäîãî ñóïåððàñïëàâà, à òàêaeå èõ âëèÿíèþ íà äâèaeåíèå äèñëîêàöèé è îáðàçîâàíèå àìîðôíîé ñòðóêòóðû èìååò ìåñòî çíà÷èòåëüíîå ïîâûøåíèå ìèêðîòâåðäîñòè, èçíîñîñòîéêîñòè è âÿçêîñòè ðàçðóøåíèÿ ìàãíèåâîãî ñïëàâà. Óñêîðåííûå ðåaeèìû íàãðåâà ëàçåðîì è îõëàaeäåíèÿ â aeèäêîì àçîòå ñïîñîáñòâîâàëè óìåíüøåíèþ ðàçìåðîâ çåðåí â óïðî÷íåííîì ïîâåðõíîñòíîì ñëîå è ôîðìèðîâàíèþ àìîðôíîé ñòðóêòóðû. Áîëüøèíñòâî äèñëîêàöèé áûëî îáíàðóaeåíî â óïðî÷íåííîì ñëîå, à íå â ïîäëîaeêå. Èñêàaeåíèå êðèñòàëëè÷åñêîé ðåøåòêè, âûçâàííîå âûñîêîé êîíöåíòðàöèåé àëþìèíèÿ, ðàñòâîðåííîãî â a-Mg ôàçå, òàêaeå ïîâûøàåò óñòîé÷èâîñòü äàííîãî ñïëàâà ê äâèaeåíèþ äèñëîêàöèé.Êëþ÷åâûå ñëîâà: ìàãíèåâûé ñïëàâ, ëàçåðíîå ïîâåðõíîñòíîå óïðî÷íåíèå, ìåõàíèçì óïðî÷íåíèÿ, áûñòðîå îõëàaeäåíèå, äâèaeåíèå äèñëîêàöèé. Introduction.With the rapid development of modern science and technology, magnesium alloy plays an increasing important role in science development and industrial application because of their advantages of low density, high specific strength and good elastic modulus, and so on [1]. But there are still some weaknesses of magnesium alloy material, such as poor hardness, wear resistance and fracture toughness, limited its wider application and development [2].The main forms of metal failure are fracture, corrosion and wear, which begin from the material's surface in many cases. Therefore, according to the relationship of material's composition, microstructure and performance, the comprehensive performance of magnesium alloy could be strengthened by surface modifying, without changing the original characteristics of magnesium alloy except the modified zone [3].

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confidence: 99%