Paper Title:
Grain Boundary Sliding Phenomenon and Its Effect on High Temperature Ductility of Ni-Base Alloys
  Abstract

The structural materials phase transformations and failure mechanisms have been under scrutiny for many years. However, the advent of new and more powerful techniques is always making possible to address unsolved problems. Nowadays, the implementation of sophisticated in-situ electron microscopy tests is providing new insights in several fields of chemistry, physics, and materials science by allowing direct observation of a wide variety of phenomena at submicron and even atomic scale. These experiments may involve controlled temperature and atmospheres, mechanical loading, magnetic and/or electric field among other conditions that are imposed to the sample while its response or evolution is studied. An in-situ high temperature deformation experiment was developed and adapted within the vacuum chamber of a scanning electron microscope (SEM). This setup was used to study the grain boundary sliding (GBS) mechanism and its effect on the high temperature cracking phenomenon known as ductility-dip cracking (DDC). The Ni-base filler metals AWS A5.14, ERNiCrFe-7 and ERNiCr-3, which correspond to alloys 690 and 600, respectively, were studied within the temperature range between 700 and 1000 °C. Analysis of the recorded digital videos that registered the high temperature deformation made possible differentiating and quantifying, with submicron resolution, two different components of GBS. The designated pure-GBS and deformation-GBS components were described and quantified. In addition, the GBS relationship with the material high temperature ductility and the DDC failure mechanism was established.

  Info
Periodical
Materials Science Forum (Volumes 638-642)
Main Theme
Edited by
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
Pages
2858-2863
DOI
10.4028/www.scientific.net/MSF.638-642.2858
Citation
E.A. Torres, R. Caram, A. J. Ramirez, "Grain Boundary Sliding Phenomenon and Its Effect on High Temperature Ductility of Ni-Base Alloys", Materials Science Forum, Vols. 638-642, pp. 2858-2863, 2010
Online since
January 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jun Peng, Song Bo Li, Wen Guang Zhao, Xi Wen Song, Sheng Li An
Chapter 9: New Energy Materials and Environmental Materials
Abstract:Cu-based anode has no or little catalytic activity to reaction of precipitating carbon during using carbon-hydrogen fuel, which can avoid...
1647
Authors: Jimy S. Unfried, Antonio Jose Ramirez
Chapter 7: Fracture and Mechanical Behaviour
Abstract:The microstructure behavior during high temperature deformation of Ni-base alloys based on alloy 690 modified with Nb, Mo, and Hf additions...
945
Authors: Zeng Rong Liu, Qing Juan Sun, Zhi Fang Yan
Chapter 1: Geotechnical Engineering
Abstract:The bearing capacity of residue pile composite foundation formed by deep dynamic compaction, shorted for DDC, is calculated and analyzed by...
302
Authors: Li Ping Liang, Xuan Cheng, Ying Zhang
Chapter 1: Testing Techniques and Devices
Abstract:A lanthanum doped lead zirconate titanate (PLZT) ceramic specimen was prepared by the conventional solid state reaction method. The crystal...
25