摘要
利用应变诱发熔化激活(SIMA)法制备了7075合金半固态坯料,分析了预变形量对坯料的显微组织及室温压缩性能的影响,研究了不同预变形量下的半固态坯料的室温压缩变形能力。结果表明,预变形量越大,7075合金半固态坯料的初生α-Al固相颗粒越细小、球形率越好,液相率越高,抗压强度与屈服强度随之逐渐升高;预变形量值达到12%以后,半固态组织形态与压缩力学性能都趋于稳定。同时,预变形量的增加,可有效提高7075合金半固态坯料的室温压缩变形能力,当预变形量达到12%以上时,坯料的塑性变形能力较强。
7075 alloy semi-solid billets were prepared by the strain-induced melt activation（ SIMA） technology. Effects of the pre-deformation on microstructure and compression properties of the 7075 aluminum alloy semi-solid billets were analyzed. The compression deformation ability of the semi-solid billets with different pre-deformation at room temperature was investigated. The results show that the larger the pre-deformation is,the finer the primary α-Al solid particles are,the better the spherical rate and the higher the rate of liquid phase are. The compressive strength and yield strength increase accordingly with the increase of pre-deformation; however,when the pre-deformation degree is higher than12%,the semi-solid microstructure morphology and compression mechanical properties become to stable. In the meantime,room temperature compression deformation ability of the 7075 alloy semi-solid billets can be effectively improved with the increase of pre-deformation degree,when the pre-deformation degree is higher than 12%,semi-solid billets have a stronger plastic deformation.
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第2期127-131,共5页
Heat Treatment of Metals
基金
国家自然科学基金(51474091)
河北省自然科学基金(E2013209268)
河北省高等学校科学技术研究项目(Q2012011
Z2013129)
华北理工大学培育基金(GP201527)
关键词
应变诱发熔化激活法
7075铝合金
预变形量
显微组织
压缩性能
strain-induced melt activation technology
7075 aluminum alloy
pre-deformation
microstructure
compression properties
