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等通道轉(zhuǎn)角擠壓Mg-3.52Sn-3.32Al合金的組織與力學(xué)性能
作者:
作者單位:

1.西安理工大學(xué);2.廣東省材料與加工研究所廣東省金屬?gòu)?qiáng)韌化技術(shù)與應(yīng)用重點(diǎn)實(shí)驗(yàn)室;3.西安工業(yè)大學(xué)

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基金項(xiàng)目:

陜西省科技計(jì)劃項(xiàng)目2010K10-08，陜西省教育廳科學(xué)研究計(jì)劃項(xiàng)目2013JK0906，陜西省光電功能材料與器件重點(diǎn)實(shí)驗(yàn)室項(xiàng)目ZSKJ201302，廣東省金屬?gòu)?qiáng)韌化技術(shù)與應(yīng)用重點(diǎn)實(shí)驗(yàn)室項(xiàng)目（2014B030301012），廣東省高新技術(shù)產(chǎn)業(yè)化項(xiàng)目（2013B010102021），陜西省光電功能材料與器件重點(diǎn)實(shí)驗(yàn)室項(xiàng)目（ZSKJ201302）資助


Microstructure and tensile properties of solutionized Mg-3.52Sn-3.32Al alloy deformed by equal channel angular pressing
Author:
Affiliation:

1.Xi''an University of Technology;2.Guangdong Provincial Key Laboratory for Technology and Application of Metal Toughening, Guangdong Institute of Materials and Processing;3.Xi''an Technological University

Fund Project:

Shaanxi Provincial Science and Technology Plan Project (2010K10-08); the Scientific Research Project of Education Department of Shaanxi Province (2013JK0906); the fund of Shaanxi Key Laboratory of Optoelectronic Functional Materials and Devices (No.ZSKJ201302); Natural Science Foundation of Guangdong Province (2016A030313802); Project on Scientific Research of Guangzhou City (201707010393).

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    摘要:

    采用等通道轉(zhuǎn)角擠壓（ECAP）Bc路徑對(duì)固溶態(tài)Mg-3.52Sn-3.32Al合金分別擠壓1、4和8道次。利用光學(xué)顯微鏡、掃描電子顯微鏡、透射電子顯微鏡和X射線衍射儀分析合金的組織和相組成，并測(cè)試了其室溫拉伸力學(xué)性能。結(jié)果表明，經(jīng)ECAP擠壓后，固溶態(tài)合金組織中析出大量細(xì)小的Mg2Sn相和極少量的Mg17Al12相。隨擠壓道次增加，合金的綜合力學(xué)性能先提高后降低。經(jīng)4道次擠壓后，合金的綜合拉伸力學(xué)性能相對(duì)較佳，抗拉強(qiáng)度、伸長(zhǎng)率和硬度分別達(dá)到250 MPa、20.5%和61.3 HV9.8，較未ECAP時(shí)分別提高43.7%、105%和26.9%。經(jīng)ECAP擠壓的合金室溫拉伸斷口均呈韌性斷裂。等通道轉(zhuǎn)角擠壓Mg-3.52Sn-3.32Al合金的力學(xué)性能受晶粒尺寸、析出相以及組織織構(gòu)的共同影響。

    Abstract:

    The solutionized Mg-3.52Sn-3.32Al(wt.%) alloy was processed by equal channel angular pressing (ECAP) via route Bc for 1, 4, and 8 passes, respectively. The microstructure and phase composition of the alloy were analyzed by optical microscope, scanning electron microscopy, transmission electron microscopy and X-ray diffraction, and the room-temperature mechanical properties were measured. The results show that many fine Mg2Sn particles and a few Mg17Al12 phases precipitate in the alloy after ECAP. The mechanical properties of the alloy first increase and then decrease gradually with increasing extrusion passes. The alloy possesses better mechanical properties after ECAP for four passes, the ultimate tensile strength, elongation and hardness increase to 250 MPa, 20.5% and 61.3 HV9.8 respectively, which is increased by 43.7%, 105% and 26.9% compared with the solutionized alloy. The room temperature fractograph of the ECAP processed alloy is ductile-fractured morphology under tensile condition.The mechanical properties of the ECAP processed Mg alloy is dependent on the grain size, precipitate and texture.

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張忠明,黃正華,任偉偉,徐春杰,惠增哲.等通道轉(zhuǎn)角擠壓Mg-3.52Sn-3.32Al合金的組織與力學(xué)性能[J].稀有金屬材料與工程,2019,48(2):385~393.[zhang zhongming, HUANG Zhenghua, Ren Weiwei, Xu Chunjie, Xi Zengzhe. Microstructure and tensile properties of solutionized Mg-3.52Sn-3.32Al alloy deformed by equal channel angular pressing[J]. Rare Metal Materials and Engineering,2019,48(2):385~393.]
DOI：10.12442/j. issn.1002-185X.20170814

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  • 收稿日期:2017-09-08
  • 最后修改日期:2019-02-15
  • 錄用日期:2018-09-14
  • 在線發(fā)布日期: 2019-03-15
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