13
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Quantitative Representation of Mechanical Behavior of the Surface Hardening Layer in Shot-Peened Nickel-Based Superalloy

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Surface hardening treatment can usually introduce severe grain distortion with a large gradient in the surface layer. It results in mechanical properties being difficult to accurately determine through macroscopic tests due to the non-uniformity of the shot-peened material. In this study, the mechanical behavior of uniformly pre-deformed nickel-based superalloy IN718 was investigated with monotonic tensile tests and instrumented indentation tests. For the shot-peened material, the hardness distribution of the surface hardening layer after shot peening was identified through the instrumented indentation method. According to the stress–strain results of pre-deformed materials, Ramberg–Osgood model parameters could be presented with plastic deformation. Assuming the power-law relationship between hardness and plastic deformation, the plastic deformation distribution along the depth of the surface hardening layer was clarified. Based on the results, a method to identify the stress–strain relationships of hardened material at different depths was established. Finally, the finite-element simulations of the instrumented indentation test considered residual stress and strain hardening were built to verify the method presented herein. The results show that the solution to evaluate the mechanical properties of hardening layer materials in the microscopic zone is feasible, which can provide the foundation for the failure analysis of shot-peened materials.

          Related collections

          Most cited references34

          • Record: found
          • Abstract: not found
          • Article: not found

          An evaluation of shot peening, residual stress and stress relaxation on the fatigue life of AISI 4340 steel

          M. Torres (2002)
            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            On the effect of deep-rolling and laser-peening on the stress-controlled low- and high-cycle fatigue behavior of Ti–6Al–4V at elevated temperatures up to 550°C

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Surface characteristics and fatigue behavior of shot peened Inconel 718

                Bookmark

                Author and article information

                Journal
                Materials (Basel)
                Materials (Basel)
                materials
                Materials
                MDPI
                1996-1944
                21 March 2020
                March 2020
                : 13
                : 6
                : 1437
                Affiliations
                [1 ]School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
                [2 ]Institute for Aero Engine, Tsinghua University, Beijing 100084, China
                Author notes
                Author information
                https://orcid.org/0000-0003-1821-5061
                Article
                materials-13-01437
                10.3390/ma13061437
                7143472
                32245236
                fbe3e4e7-cc56-4e7c-91be-2ae2fac40aea
                © 2020 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 14 February 2020
                : 18 March 2020
                Categories
                Article

                surface hardened modified layers,pre-deformed material,instrumented indentation,microscopic zone mechanical behavior

                Comments

                Comment on this article