研究了Cu-12.8%Fe复合材料形变热处理时退火温度和形变量对复合材料微观组织、导电率及抗拉强度的影响。结果表明,退火温度的升高,Fe纤维逐渐出现弯曲、断开等再结晶现象,退火处理后进一步拉拔可以增加纤维的连续性,恢复纤维的拉拔特征,且Fe纤维较退火处理后纤维细小;随形变量的增加,复合材料的抗拉强度逐渐增加,导电率逐渐降低,450℃×1 h退火处理后复合材料的加工硬化率增加最为显著,且450℃退火处理后形变至减面率为81.6%时,抗拉强度与导电率分别增加了10%和5%。对比研究表明450℃是较好的退火处理温度,获得的较优综合匹配性能分别为615 MPa/59.5%IACS（450℃×1 h,η=8.19）、1008 MPa/53.3%IACS（450℃×1 h,η=9.93）,并分析了其原因。
Effects of annealing temperature during thermo-mechanical process on microstructure,strength and conductivity of Cu-12.8%Fe composites were investigated.The results show that Fe fibers undergo the curling and breaking-up phenomena related to recrystallization with increasing annealing temperature,the continuity of the Fe fibers increases with the further drawing after annealing,and thus the characteristic morphology of the drawn composites recovers.The finer Fe fibers are observed with increasing drawing ratio.The strength increases and the conductivity decreases for the Cu-Fe composites with increasing drawing ratio.The working hardening ratio increases significantly for the composites anealed at 450 ℃ for 1 h.The strength and conductivity of Cu-Fe composites increase by 10% and 5%,respectively,when the composites are deformed to area reduction of 81.6% after annealing at 450 ℃ for 1 h.The Cu-Fe composites exhibit superior property combinations with strength of 615 MPa and conductivity of 59.5% IACS at η=8.19,and strength of 1008 MPa and conductivity of 53.3% IACS at η=9.93 after annealing at 450 ℃ for 1 h.The mechanism for the property improvement is discussed.
参考文献
| [1] | 左小伟,王恩刚,屈磊,赫冀成.原位形变Cu-14.5%Fe复合材料的组织和性能研究（Ⅱ）--力学和导电性能[J].东北大学学报（自然科学版）,2010(09):1258-1261. |
| [2] | Haiyan Gao;Jun Wang;Baode Sun .Effect of Ag on the thermal stability of deformation processed Cu-Fe in situ composites[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):580-586. |
| [3] | Verhoeven J D;Chuch S C;Gibson E D .Strength and conductivity of in situ Cu-Fe alloys[J].Journal of Materials Science,1989,24(05):1748-1752. |
| [4] | Gao H Y;Wang J;Shu D et al.Microstructure and properties of Cu-ll Fe-6Ag in situ composite after thermo-mechanical treatments[J].Journal of Alloys and Compounds,2007,438(1-2):268-273. |
| [5] | S.I. Hong;J.S. Song;H.S. Kim .Thermo-mechanical processing and properties of Cu-9Fe-1.2Co microcomposite wires[J].Scripta materialia,2001(11):1295-1300. |
| [6] | 刘克明,周海涛,陆德平,Andrej Atrens,邹晋,陈志宝,谢仕芳.微量Ag对形变Cu-Fe原位复合材料组织和性能的影响[J].材料热处理学报,2010(06):62-67. |
| [7] | Gao HY;Wang J;Shu D;Sun BD .Effect of Ag on the aging characteristics of Cu-Fe in situ composites[J].Scripta materialia,2006(11):1931-1935. |
| [8] | Wu Z W;Chen Y;Meng L .Effects of rare earth elements on annealing characteristics of Cu-6wt% Fe composites[J].Journal of Alloys and Compounds,2009,477(1-2):198-204. |
| [9] | Yao Z;Ge J;Liu S .Effect of doping with Zr on the properties of the deformation-processed Cu-Fe in-situ composites[J].Journal of Materials Science,2006(12):3825-3829. |
| [10] | Spitzig W A;Chumbley L S;Verhoeven J D et al.Effect of temperature on the strength and conductivity of a deformation processed Cu-20% Fe composite[J].Journal of Materials Science,1992,27(08):2005-2011. |
| [11] | Thilly L.;Veron M.;Ludwig O.;Lecouturier F.;Peyrade JP.;Askenazy S. .High-strength materials: in-situ investigations of dislocation behaviour in Cu-Nb multifilamentary nanostructured composites[J].Philosophical Magazine.A.Physics of condensed matter, defects and mechanical properties,2002(5):925-942. |
| [12] | Pourrahimi S;Nayeb-hashemi H;Foner S .Strength and microstructure of powder metallurgy processed restacked Cu-Nb microcomposites[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1992,25(02):573-586. |
| [13] | Snoeck E;Lecouturier F;Thilly L et al.Microstructural studies of in-situ produced filamentary Cu-Nb Wires[J].Scripta Materialia,1998,38(11):1643-1648. |
| [14] | Langford G;Cohen M .Strain hardening of iron by severe plastic deformation[J].Transactions of the ASM,1969,62:623-638. |
| [15] | He L;Ma E .Processing and microhardness of bulk Cu-Fe nanocomposites[J].Nano-Structured Materials,1996,7(3-4):327-339. |
| [16] | Konstantinidis D A;Aifantis E C .On the " anomalous" hardness of nanoerystalline materials[J].Nanostructured Materials,1998,10(07):1111-1118. |
| [17] | A.BENGHALEM;D.G.MORRIS .MICROSTRUCTURE AND STRENGTH OF WIRE-DRAWN Cu-Ag FILAMENTARY COMPOSITES[J].Acta materialia,1997(1):379-406. |
| [18] | 葛继平 .形变Cu-Fe原位复合材料[D].大连交通大学,2005. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%