Purpose

Titanium (Ti) alloys are in high demand in manufacturing industries all over the world. The property like high strength to weight ratio makes Ti alloys highly recommended for aerospace industries. Ti alloys possess good weldability, and therefore, they were extensively investigated with regard to strength and metallurgical properties of welded joint. This study aims to deal with the analysis of strength and microstructural changes in Ti-6Al-4V (Grade 5) alloy after tungsten inert gas (TIG) welding.

Design/methodology/approach

Two pair of Ti alloy plates were welded in two different voltages, i.e. 24 and 28 V, with keeping the current constant, i.e. 80 A It was a random selection of current and voltage values to check the performance of welded material. Both the welded plates were undergone through some mechanical property analysis like impact test, tensile test and hardness test. In addition, the microstructure of the welded joints was also analyzed.

Findings

It was found that hardness and tensile properties gets improved with an increment in voltage, but this effect was reverse for impact toughness. A good corroboration between microstructure and mechanical properties, such as tensile strength, hardness and toughness, was reported in this work. Heat distribution in both the welded plates was simulated through ANSYS software to check the temperature contour in the plates.

Originality/value

A good corroboration between microstructure and mechanical properties, such as tensile strength, hardness and toughness, was reported in this study.

中文翻译：

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TIG焊接Ti-6Al-4V钛合金的力学性能和组织性能评估

目的

钛（Ti）合金在全世界的制造业中都有很高的需求。高强度/重量比之类的特性使Ti合金极受航空航天工业的欢迎。钛合金具有良好的焊接性，因此，对焊接接头的强度和冶金性能进行了广泛的研究。这项研究的目的是分析在惰性气体保护（TIG）焊接后的Ti-6Al-4V（5级）合金的强度和显微组织变化。

设计/方法/方法

在保持电流恒定（即80 A）的情况下，在两个不同的电压（即24和28 V）下焊接两对Ti合金板。这是电流和电压值的随机选择，以检查焊接材料的性能。两块焊接板都经过了一些机械性能分析，例如冲击试验，拉伸试验和硬度试验。此外，还分析了焊接接头的微观结构。

发现

发现随着电压的增加，硬度和拉伸性能得到改善，但是这种效果对于冲击韧性是相反的。在这项工作中，在微观结构和机械性能（例如拉伸强度，硬度和韧性）之间得到了很好的证实。通过ANSYS软件模拟了两个焊接板中的热分布，以检查板中的温度轮廓。

创意/价值

这项研究报告了在微观结构和机械性能之间的良好佐证，例如抗张强度，硬度和韧性。