摘要
对Cu-Fe非晶合金基复合材料进行了成分设计,研究了半固态处理工艺对(Cu0.7Fe0.3)88-xAl12Zrx组织和力学性能的影响。结果表明,Zr含量增加能够提高(Cu0.7Fe0.3)88-xAl12Zrx的非晶形成能力,x=50时试样为全非晶结构,过热吸铸试样其过冷液相区宽度ΔTx为92.4 K,约化玻璃转变温度Trg和γ参数分别为0.415和0.361,试样具有良好的热稳定性和非晶形成能力,且其断裂强度显著高于复合材料,压缩断裂强度高达1734 MPa。x=10的试样中马氏体相对塑性的提高有一定效果,但是缺乏非晶基体的强度。随着Zr的添加,Fe的比例降低,试样中塑性相消失,析出脆性金属间化合物较多,试样脆性大。半固态处理试样的非晶热稳定性降低,有利于晶体相的析出,且母合金经半固态处理过后试样的组织更加均匀,力学性能得到明显改善。
A component of Cu-Fe amorphous matrix based composites was designed. And the effects of semi-solid processing on microstructure and mechanical properties of（ Cu0. 7Fe0. 3）88- xAl12 Zrxwere studied. The results showed that the increase of Zr addition could enhance the glass forming ability of（ Cu0. 7Fe0. 3）88- xAl12 Zrx. And the sample x = 50 with fully amorphous structure exhibited good thermal stability and glass forming ability. The super-cooled liquid region ΔTx,reduced glass-transition temperature Trgand γ parameter of sample x = 50 were up to 92. 4 K,0. 415 and 0. 361. Meanwhile,the compressive fracture strength of the sample x = 50 was up to 1734 MPa,which was significantly higher than that of samples with composite structure. The martensite phase in the sample x = 10 was short of strength compared with the amorphous matrix,although contributed to a certain enhancement of the plasticity. As Zr was added and Fe was reduced,the plastic phase disappeared and the brittle intermetallic compound increased,as a result,the sample exhibited a big brittleness. The samples treated by semi-solid processing,and exhibited better mechanical properties,the structure of which was more uniform.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2014年第6期1011-1016,共6页
Chinese Journal of Rare Metals
基金
国家自然科学基金项目(50961008
51061008)
国家科技部"973计划"前期研究专项(2011CB612203)
高等学校博士学科点专项科研基金资助课题(20116201120003)
甘肃省青年科技基金计划(1107RJYA275)
浙江省自然基金项目(LQ13E010002)
甘肃省高等学校科研项目(2013A-040)资助
关键词
块体非晶合金
半固态处理
组织
力学性能
bulk amorphous alloy
semi-solid process
structure
mechanical properties
