In the present paper, single crystal tungsten model has been established by using molecular dynamics simulation. The joining of two single-crystal tungsten has been shown using two different welding techniques namely Cold welding and Linear Friction Welding (LFW) at room temperature. The tungsten atom interactions have been developed using the Embedded Atom Method potential. The Radial Distribution Function (RDF) simulation has been performed for two different layer thickness around the welded region for structural analysis. It has been found that as the layer thickness increases the probability of getting perfect structure atoms in long range order decreases. It has also been observed that few dislocations are generated during welding. The tensile properties have also been investigated for the sample joined by two processes for 50 ps, 100 ps and 150 ps at a strain rate of 1.5 × 10⁹ sec⁻¹. The results show that the joint developed by cold welding process at 100 ps resulted in a yield strength of 3588 MPa and ultimate strength of 6678 MPa. During LFW yield strength (5152 MPa) and ultimate strength (7172 MPa) is achieved in less welding time i.e. 50 ps.

本文通过分子动力学模拟建立了单晶钨模型。已经证明在室温下使用两种不同的焊接技术（即冷焊和线性摩擦焊（LFW））连接两种单晶钨。钨原子的相互作用已使用Embedded Atom方法势进行了开发。已对围绕焊接区域的两个不同层厚度执行了径向分布函数（RDF）仿真，以进行结构分析。已经发现，随着层厚度的增加，获得长距离顺序的完美结构原子的可能性降低。还已经观察到在焊接期间几乎不产生位错。还研究了通过50 ps的两个过程连接的样品的拉伸性能，⁹秒^-1。结果表明，在100 ps的条件下通过冷焊工艺形成的接头产生的屈服强度为3588 MPa，极限强度为6678 MPa。在LFW中，屈服强度（5152 MPa）和极限强度（7172 MPa）在较短的焊接时间（即50 ps）中获得。