锰含量对1050铝合金PS版基组织及性能的影响

Effect of Mn content on microstructure and properties of 1050 Al-alloy PS plates

采用光学显微镜、扫描电镜等观察方式与拉伸测试手段,研究了锰含量对PS版基用1050铝合金微观组织与力学性能的影响。结果表明,基体纤维组织的细化程度随锰含量的增加而提高,但是Mn在1050铝合金中的细化效果远不及Al-Ti-C的;随着锰含量增加(w(Mn)=0.1%、0.2%、0.3%),1050铝合金中第二相Al3Fe、β-Al(Fe,Si)随之减少,α-Al(Fe,Si)、Al6Mn相却随锰含量的增加而增多;当w(Mn)=0.2%时,基体的第二相占比降到最低值,当w(Mn)=0.3%时,基体初步形成了较为粗大的Al-Fe-Mn化合物;PS版基的抗拉强度随着锰含量的增加而降低,合金硬度值随锰含量的增加而增大。

Microstructure and the mechanical behavior of 1050 Al-alloy PS plates were studied with Optical Microscopy（ OM）,Scanning Electron Microscopy（ SEM）,and tensile tests. The results show that the matrix fiber is refined deeply as Mn increases,but the refinement effect of Mn in 1050 Al-alloy is far below that in Al-Ti-C. As w（ Mn） increases from0. 1% to 0. 3%,Al3 Fe and β-Al（ Fe,Si） reduce,while α-Al（ Fe,Si） and Al6 Mn increase among the second phases of 1050 Al-alloy. When w（ Mn） is 0. 2%,the matrix has the minimum percentage of the second phases. When w（ Mn） is 0. 3 %,relatively coarse Al-Fe-Mn compounds are formed initially in the matrix. As Mn increases,tensile strength of PS plates decreases and alloy hardness is enhanced.