采用多向鍛造（MDF）和擠壓（EX）相結(jié)合工藝對(duì)TiC納米顆粒增強(qiáng)Mg-4Zn-0.5Ca基納米復(fù)合材料進(jìn)行變形。與僅單一MDF相比,經(jīng)MDF+EX變形后納米復(fù)合材料的晶粒尺寸顯著減小。當(dāng)MDF溫度為270°C時(shí),隨MDF道次的增加,經(jīng)EX變形后再結(jié)晶（DRX）晶粒的平均尺寸逐漸增大;而當(dāng)MDF溫度為310°C時(shí),經(jīng)EX變形后DRX晶粒的平均尺寸顯著減小。經(jīng)MDF+EX多步變形后納米復(fù)合材料中同時(shí)出現(xiàn)細(xì)小和粗大的MgZn₂相,這些MgZn₂相的體積分?jǐn)?shù)隨EX前MDF道次的增加而逐漸增大。對(duì)溫度為310°C經(jīng)3道次MDF后的納米復(fù)合材料進(jìn)行EX,其屈服強(qiáng)度、極限抗拉強(qiáng)度和伸長(zhǎng)率分別達(dá)到～404 MPa,～450.3 MPa和～5.2%。這主要與MDF+EX多步變形后晶粒細(xì)化強(qiáng)化及MgZn₂析出相引起的Orowan強(qiáng)化有關(guān)。 

【文章來(lái)源】：Transactions of Nonferrous Metals Society of China. 2020,30(09)EISCICSCD

【文章頁(yè)數(shù)】：19 頁(yè)

【文章目錄】：
1 Introduction
2 Experimental
    2.1 Materials
    2.2 Multi-step deformation
    2.3 Microstructural characterization
    2.4 Tensile properties
3 Results
    3.1 Microstructures of Ti Cp/Mg-4Zn-0.5Ca nanocomposites after MDF270 and MDF270+EX processing
    3.2 Microstructures of Ti Cp/Mg-4Zn-0.5Ca nanocomposites after MDF310 andMDF310+EX
    3.3 Tensile properties of Ti Cp/Mg-4Zn-0.5Ca nanocomposites after (MDF+EX) multi-step deformation
4 Discussion
    4.1 Microstructures of nanocomposites after MDF+EX multi-step deformation
    4.2 Tensile properties
    4.3 Influence of deformation processing on microstructure and mechanical properties
5 Conclusions


【參考文獻(xiàn)】：
期刊論文
[1]高壓下Mg-5.88Zn-0.53Cu-0.16Zr合金凝固組織特征及其強(qiáng)化機(jī)制（英文）[J]. 郭坤宇,徐暢,林小娉,葉杰,張沖,黃鐸.  Transactions of Nonferrous Metals Society of China. 2020(01)
[2]Evolution of Microstructure, Residual Stress, and Tensile Properties of Mg–Zn–Y–La–Zr Magnesium Alloy Processed by Extrusion[J]. Huseyin Zengin,Yunus Turen,Muhammet Emre Turan,Fatih Ayd?n.  Acta Metallurgica Sinica（English Letters）. 2019(11)
[3]經(jīng)變形前退火、熱壓縮和時(shí)效處理后的Mg-8Gd-4Y-1Nd-0.5Zr合金的組織、織構(gòu)和力學(xué)性能（英文）[J]. 吳懿萍,熊漢青,賈寓真,謝邵輝,李國(guó)鋒.  Transactions of Nonferrous Metals Society of China. 2019(05)
[4]Zn添加對(duì)鑄造Mg-Gd-Y-Zr合金組織和力學(xué)性能的影響（英文）[J]. 丁志兵,趙宇宏,魯若鵬,原梅妮,王志軍,李會(huì)軍,侯華.  Transactions of Nonferrous Metals Society of China. 2019(04)
[5]Hall-Petch relationship in Mg alloys: A review[J]. Huihui Yu,Yunchang Xin,Maoyin Wang,Qing Liu.  Journal of Materials Science & Technology. 2018(02)



本文編號(hào)：3517965