Pan American Materials Congress: Steels: Properties and Performance
Sponsored by: Third Pan American Materials Congress Organizing Committee
Program Organizers: Omar Garcia-Rincon, TERNIUM Mexico SA de CV; Andre Costa E Silva, EEIMVR - Universidade Federal Fluminense

Tuesday 10:20 AM
February 28, 2017
Room: Marina E
Location: Marriott Marquis Hotel

Session Chair: Kester Clarke, Colorado School of Mines

10:20 AM  Invited
Developing Sustainable Pipeline Steels: Hani Henein1; 1University of Alberta
    As conventional supplies of oil and gas are being exhausted, new sources of energy must be harvested from increasingly harsh environments using new technologies. The technological challenges of transporting these resources from production sites to markets requires construction of an infrastructure for transportation to processing hubs in Western Canada and to markets in Eastern and Western Canada, and the U.S. Both production and transmission of oil and gas from these remote locations demand improved materials to ensure reliability, public safety and environmental protection. This is required in order to have a sustainable infrastructure for energy delivery. This presentation will describe nearly two decades of collaboration between industry and university to advance and improve microalloyed steels which are used for the transmission of oil and gas.

10:50 AM  
The Effect of Particle Speed and Impact Angle on the Erosion of Newly Developed API X120 Pipeline Steel: Paul Okonkwo1; R. Shakoor1; A.M Mohamed2; 1Qatar University; 2Department of Metallurgical and Materials Engineering, Faculty of Petroleum and Mining Engineering, Suez University
    The need of transporting petroleum products has resulted in increased erosion of pipeline steel components. The effect of particle speed and impact angle on the erosion behavior of a newly developed pipeline steel (APIX120) is presented in this research work. Dry erosion test was performed on APIX120 steel using different particle velocities and various incident angles for different durations. The results indicate that particle velocity and incident angle have a significant influence on the erosion behavior of APIX120 steel. It is further noticed that at lower impact angle and particle speed, the plastic deformation, micro forging and embedment of the erodent particles on the surface of the target material is the predominant erosion mechanism while at high impact angle and particle speeds cutting of the target material surface is the dominant erosion mechanism. EDX results confirmed material transfer from the erodent to the target material during the erosion tests.

11:10 AM  
The Development of NbC Reinforced Martensitic Stainless Steel Composites for High Wear and Corrosive Environments: Wen Hao Kan1; Qaiser Ihsan Gondal1; Xin Zhou1; Jiahui Li1; Zi Jie Ye1; Yue Zhu1; Vijay Bhatia1; Kevin Dolman2; Timothy Lucey2; Xinhu Tang2; Chang Li1; Gwnalle Proust1; Julie Cairney1; 1The University of Sydney; 2Weir Minerals Australia
    In order to develop a viable replacement for the high chromium white cast irons that are typically used in mining and mineral processing industries, martensitic stainless steels reinforced with NbC have been developed using a vacuum induction furnace. Microscopy was used to compare the microstructures obtained for these new composites prepared using sand moulds versus graphite moulds. The wear performance was then compared to that of an appropriate high chromium white cast iron benchmark using pin on disc tests. SiC, Si3N4, WC and ZrO2 balls were used as pin materials and the results of all test types revealed that the composites offered better wear performance than the cast iron benchmark even for low total carbide volume fractions. Finally, the impact of NbC reinforcement on the corrosion resistance of these composites was evaluated using electrochemical accelerated corrosion tests.

11:30 AM  
Hot-stamping Response of Laser Welds in Low-carbon Steels: Martha Guerrero-Mata1; Michael Andreassen2; S Liu3; O Garcia4; J. Speer3; 1Universidad Autonoma de Nuevo Leon; 2Technical University of Denmark; 3Colorado School of Mines; 4Ternium Mexico
    A laser welding study of two low carbon steels (22MnB5 and HSLA), that have opportunity to manufacture components for the automotive industry, such as tailor welded blanks, is presented. Welding conditions with varying power (600 and 700 W) and welding speed (15 and 20 in/min) were applied and the microstructure and mechanical performance assessed, this information helped to validate a numerical simulation of the process. Coupons of the steels were welded using a 1.1 kW Yb-Fiber Optic IPG Laser Welding System, all joins were similar and square butt. Characterization of the welds included distortion, microhardness, mechanical testing, metallography, heat affected zone measurements, fractography and residual stresses measured according to the Hole-Drilling Strain Gage Method. To explore the weldments under hot stamping conditions, heat treatment of the welded samples was carried out and the performance evaluated by tensile testing. Results show that 22MnB5 exhibited better performance under the laser welding process.

11:50 AM  
The Influence of Hydrogen on Tensile Properties of TRIP-aided Bainitic Ferrite Steels with Carbon/Manganese Variations: Andrea Bollinger1; John Speer1; Kip Findley1; Emmanuel De Moor1; Toshio Murakami2; 1Colorado School of Mines; 2Kobe Steel LTD
    A series of four TRIP-Aided Bainitic Ferrite sheet steels with systematic variations in carbon and manganese concentrations was prepared and tensile tested over a range of hydrogen concentrations to characterize the influence of varying composition and microstructure on susceptibility to hydrogen embrittlement. The alloys were designed to have identical carbon equivalency values and similar initial tensile strengths to eliminate the influences of these factors on hydrogen embrittlement susceptibility. Changes in tensile properties for each alloy were determined for similar hydrogen charging conditions, total hydrogen contents and diffusible hydrogen contents. The retained austenite amounts and austenite morphologies were determined and correlated to the changes in tensile properties with increasing hydrogen levels.