周 纳米材料 纳米材料是指在三维空间中至少有一维处于纳米尺 寸(0.1-100nm)或由它们作为基本单元构成的材料。 BaTi,Mnx P62V07 Baid百科 山院 2 School of Materials Science and Engineering
材料科学与工程学院 School of Materials Science and Engineering 纳米材料 2 纳米材料是指在三维空间中至少有一维处于纳米尺 寸(0.1-100 nm)或由它们作为基本单元构成的材料
周 日田 后个 50 um 材料科学与工程学院 3 School of Materials Science and Engineering
材料科学与工程学院 School of Materials Science and Engineering 晶界 3
图 晶界 high angle grain boundary low angle grain boundary 材料科学与工程学院 4 School of Materials Science and Engineering
材料科学与工程学院 School of Materials Science and Engineering 晶界 4 low angle grain boundary high angle grain boundary
图 镁合金在脉冲磁场下的晶粒细化 10mm 材料科学与工程学院 5 School of Materials Science and Engineering
材料科学与工程学院 School of Materials Science and Engineering 镁合金在脉冲磁场下的晶粒细化 5
强烈塑性变形： SPD:Severe Plastic Deformation 强烈到什么程度？ 以等效应变度量：4 纳米十亚微米的尺寸： <100nm;100-1000nm Cold rolling Cellular type or drawing Low angle GB Granular type SPD High angle GB 材料科学与工程学院 6 School of Materials Science and Engineering
材料科学与工程学院 School of Materials Science and Engineering 6 强烈到什么程度？ 以等效应变度量：4 纳米＋亚微米的尺寸： <100nm ; 100－1000nm 强烈塑性变形： SPD：Severe Plastic Deformation • Cellular type • Low angle GB Cold rolling or drawing • Granular type • High angle GB SPD 10 µm
图 SPD起源 Load Anvil Upper Plunger 1990年之前： 俄罗斯Ufa航空技术大 Specimen 学RZ Valiev,V Lower Plunger Alexandrov用HPT Sample Support Torsion (High Pressure Torsion) a b 方法研究强烈塑性变形 Figure 2.The principle of HPT:(a)tool with a sample located within a cavity in the support anvil and(b)tool with cavities in both anvils 下的组织演变 材料科学与工程学院 School of Materials Science and Engineering
材料科学与工程学院 School of Materials Science and Engineering 7 1990年之前： 俄罗斯Ufa航空技术大 学 RZ Valiev, IV Alexandrov 用HPT (High Pressure Torsion) 方法研究强烈塑性变形 下的组织演变 SPD起源
© ECAP:Equal Channel Angular Pressing Plunger 等通道弯角挤压 等通道挤压 Die 等径角向挤压 Sample 等角挤压 等截面侧挤 70 to 100 mm in length <20 mm cross section diameter Figure 1.The principle of ECAP. 材料科学与工程学院 8 School of Materials Science and Engineering
材料科学与工程学院 School of Materials Science and Engineering 8 等通道弯角挤压 等通道挤压 等径角向挤压 等角挤压 等截面侧挤 70 to 100 mm in length <20 mm cross section diameter ECAP：Equal Channel Angular Pressing
周 Confined Channel Die Pressing 2 different routes: Additional rotation Rotation about TdRoute l about LD→Route Il A A 材料科学与工程学院 9 School of Materials Science and Engineering
材料科学与工程学院 School of Materials Science and Engineering 9 2 different routes: A A Rotation about TD Route I Additional rotation about LD Route II Confined Channel Die Pressing
周 Confined Channel Die Pressing 2 different routes: Additional rotation Rotation about TdRoute l about LD→Route Il A A 材料科学与工程学院 10 School of Materials Science and Engineering
材料科学与工程学院 School of Materials Science and Engineering 10 2 different routes: A A Rotation about TD Route I Additional rotation about LD Route II Confined Channel Die Pressing
ARB:accumulative roll-bonding A Surface treatment Cutting The ARB process has Degreasing. successfully been applied Wire brushing 4 to aluminum (1100), A1±Mgal1oy(5083) and Roll bonding Ti-added interstitial free steel. Stacking Heating 材料科学与工程学院 11 School of Materials Science and Engineering
材料科学与工程学院 School of Materials Science and Engineering 11 The ARB process has successfully been applied to aluminum (1100), Al±Mg alloy (5083) and Ti-added interstitial free steel. ARB: accumulative roll-bonding
