Cu₂ZnSn(S, Se)₄(CZTSSe) thin films were deposited on flexible substrates by three evaporation processes at high temperature. The chemical compositions, microstructures and crystal phases of the CZTSSe thin films were respectively characterized by inductively coupled plasma optical emission spectrometer (ICP-OES), scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman scattering spectrum. The results show that the single-step evaporation method at high temperature yields CZTSSe thin films with nearly pure phase and high Sn-related phases. The elemental ratios of Cu/(Zn+Sn)=1.00 and Zn/Sn=1.03 are close to the characteristics of stoichiometric CZTSSe. There is the smooth and uniform crystalline at the surface and large grain size at the cross section for the films, and no other phases exist in the film by XRD and Raman shift measurement. The films are no more with the Sn-related phase deficiency.

为了研究固态相变对马氏体钢激光熔覆成形过程应力演化的影响，建立了考虑降温过程马氏体相变的热-力耦合激光单道熔覆及多层多道堆积有限元模型。在实测材料物性参数的基础上，对单道熔覆及多层多道堆积应力演化进行了有限元分析。分析结果表明，马氏体相变对应力场演化影响显著，同只考虑热-力耦合的模型计算结果相比，考虑固态相变的情况下，有限元结果同实验值比较吻合，残余应力水平显著降低，且分布规律明显不同。

采用光纤激光对3 mm厚的7A52铝合金进行了焊接,用金相显微镜、扫描电镜、拉伸测试仪器、硬度计等分析测试手段,分析了焊接接头的微观分区组织及性能。结果表明: 采用优化后的工艺参数成功地采用光纤激光器对7A52铝合金进行了焊接,能够得到无明显缺陷的焊接接头,焊接接头由狭窄的热影响区、焊缝区以及母材三个区域组成,焊缝组织为细小的等轴晶组织,靠近熔合线附近的晶粒粗大;接头力学性能良好,拉伸试样均断裂在热影响区部位,接头的断口形貌显示混合型的断口特征。