Published April 2018 | Version v1
Journal article Metadata-only

Effect of niobium precipitation behavior on microstructure and hydrogen induced cracking of press hardening steel 22MnB5

Creators

  • 1. Ansteel Technology Center, Anshan, Liaoning 114009 (China)
  • 2. School of Material Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (China)

Description

The effect of different content of Nb on the microstructure, mechanical properties and hydrogen trapping of press hardening steel (PHS) 22MnB5 was investigated. The function of Nb addition on the microstructure was studied by SEM, TEM and XRD, etc. which indicated that the microstructure of the steels containing Nb are finer than that of steel without Nb, what's more, the lath martensite is narrower with the increase of Nb content. Certainly, the tensile strength and elongation of hot-rolled steels, hot stamping steels also were measured. To understand the influence of adsorbed hydrogen on the mechanical property of PHS, Slow Strain Rate Test (SSRT) of smooth specimen was conducted. The results of precipitation behavior and its impact on hydrogen induced cracking manifested that hydrogen embrittlement susceptibility decreased obviously with the addition of Nb content due to reduced hydrogen diffusivity.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.msea.2018.02.021

Additional details

Identifiers

DOI
10.1016/j.msea.2018.02.021;
PII
S0921509318302028;

Publishing Information

Journal Title
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
Journal Volume
721
Journal Page Range
p. 38-46
ISSN
0921-5093
CODEN
MSAPE3

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
50044019
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
CRACKING; ELONGATION; HARDENING; HYDROGEN EMBRITTLEMENT; MARTENSITE; MICROSTRUCTURE; NIOBIUM; PRECIPITATION; PRESSING; SCANNING ELECTRON MICROSCOPY; STEELS; STRAIN RATE; TENSILE PROPERTIES; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION
Descriptors DEC
ALLOYS; CARBON ADDITIONS; CHEMICAL REACTIONS; COHERENT SCATTERING; DECOMPOSITION; DEFORMATION; DIFFRACTION; ELECTRON MICROSCOPY; ELEMENTS; EMBRITTLEMENT; FABRICATION; IRON ALLOYS; IRON BASE ALLOYS; MATERIALS WORKING; MECHANICAL PROPERTIES; METALS; MICROSCOPY; PYROLYSIS; REFRACTORY METALS; SCATTERING; SEPARATION PROCESSES; THERMOCHEMICAL PROCESSES; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENTS

Optional Information

Copyright
Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.