【摘要】：提出了一種鈦合金三維點(diǎn)陣夾層結(jié)構(gòu)制備方法,采用超塑成形/擴(kuò)散連接工藝(SPF/DB)制備了金字塔型、四面體型、X型三維點(diǎn)陣夾層結(jié)構(gòu),在SPF/DB制備工藝中,采用的是五層板材,四層超塑成形工藝,成形出的結(jié)構(gòu)是三層夾層結(jié)構(gòu),其中擴(kuò)散連接工藝為:920℃/2 MPa/2 h,超塑成形工藝為:920℃/2 MPa/2 h。通過壓縮試驗(yàn)測(cè)試了不同點(diǎn)陣結(jié)構(gòu)類型、單元尺寸、點(diǎn)陣層數(shù)的壓縮性能,并進(jìn)行了對(duì)比分析。研究表明,鈦合金三維點(diǎn)陣結(jié)構(gòu)在壓縮變形機(jī)制主要包括:彈性變形、彈性屈曲、塑性屈曲、筋條斷裂,這些變形機(jī)制導(dǎo)致點(diǎn)陣結(jié)構(gòu)的壓縮曲線呈現(xiàn)應(yīng)力波動(dòng)的特征。四面體點(diǎn)陣結(jié)構(gòu)具有最高的抗壓強(qiáng)度,金字塔型點(diǎn)陣結(jié)構(gòu)具有最高的抗壓模量,X型點(diǎn)陣結(jié)構(gòu)的抗壓強(qiáng)度最小,抗壓模量居中。隨著單元尺寸和點(diǎn)陣層數(shù)的增加,鈦合金三維點(diǎn)陣的抗壓強(qiáng)度和抗壓模量迅速降低。
[Abstract]:A method for fabricating 3D lattice sandwich structure of titanium alloy was proposed. Pyramid, tetrahedral and X dimensional lattice sandwich structures were fabricated by superplastic forming / diffusion bonding (SPF/DB) process. In the process of SPF/DB fabrication, three dimensional lattice sandwich structures were fabricated. Five-layer plate and four-layer superplastic forming process are adopted. The formed structure is three-layer sandwich structure, in which diffusion bonding process is 920 鈩，

本文編號(hào)：2435441