| On The Ongoing Industrial Advancement, Welding Technology Is Much Needed In Construction, Both On Small Scale Construction As Well As The One With High Difficulty And Requirements. The High Affinity Level Of Aluminum Toward Oxygen Causes Certain Aluminum Welding Techniques To Become Complex, Thus Another Approach Of Welding With Specified Technique Is Needed Which Could Free The Weld Joint Area From Oxygen, So That The Joining Process Could Be Completed Flawlessly. This Method Of Welding Is Known As TIG. In This Study, The Problem Will Be Solved With Seeing How The Micro Structure Formed In Heat Affected Zone (HAZ) In Different Travel Time And The Relationship Between Its To The Weld Joint Strength. Metallography, Hardness Test And Tensile Srength Will Be Done In This Study Aims For Knowing The Relationship Between Welding Travel Time To Weld Joint Strength. In Standard Travel Time Welding (60 Second), The Weld Joint Strength Is 76 N/Mm2. This Value Has A Weld Joint Strength 53% From The Plate Strength, Which Is145 N/Mm2. When In A Below Standard Travel Time (<60 Second), The Filler Didn’t Fill The Seam Welds Perfectly So That The Weld Joint Strength (Su) Decreasing, 73 N/Mm2. Unlike The Case In Above Standard Travel Time (>60 Second), The Weld Joint Strength Is Increasing Significantly, Which Is 115.33 N/Mm2. Reviewed From The Hardness, Heat Affected Zone Has The Biggest Hardness Number When Its In Above Standard Travel Time (>60 Second).As Seen From The Microstructure, Not The Phase Changed In HAZ, But The Size Of The Grains. |