Accession Number : ADA290681

Title :   The Effects of Alloying Elements on the Strength and Cooling Rate Sensitivity of Ultra-Low Carbon Alloy Steel Weld Metals.

Descriptive Note : Technical rept.,

Corporate Author : NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD

Personal Author(s) : Vassilaros, M. G.

PDF Url : ADA290681

Report Date : MAR 1994

Pagination or Media Count : 60

Abstract : A study was conducted to evaluate the effect of weld cooling rate on the strength of autogenous GTAW deposited weld metal. The basic weld metal composition was based on a low carbon bainite metallurgical system. The weld metal yield strength goal was 130 ksi, needed to surpass the current HY-13O weld metal requirements. Vacuum Induction Melted (VIM) heats of steel were produced and processed into 3/4' thickness plates. The autogenous gas tungsten are welds (GTAW) on the parent steel plates were produced under two different heat input conditions. Tensile specimens were produced from the weldments; specimens from certain heats were subjected to gleeble thermal simulations of multi-pass welding conditions using the Gleeble 1500. All specimens were then evaluated for yield and ultimate tensile strength. From the data presented, it was found that the experimental compositions studied were less sensitive to cooling rate than current HY-130 welding consumables. The compositions tested approached the target yield strength of 130 ksi, but further work is necessary in this area.

Descriptors :   *COOLING, *WELD METAL, *WELDABILITY, THERMAL PROPERTIES, INPUT, SIMULATION, TENSILE STRENGTH, TENSILE PROPERTIES, VACUUM, RATES, ALLOYS, SENSITIVITY, STRENGTH(MECHANICS), STEEL, GASES, WELDMENTS, WELDS, DEPOSITION, METAL PLATES, YIELD STRENGTH, HEAT, TUNGSTEN, INDUCTION SYSTEMS, TARGET STRENGTH.

Subject Categories : Fabrication Metallurgy
      Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE