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Title: Embrittlement of an AISI 8640 lower bainite steel

Abstract

A study was performed to determine the cause of an abnormally low fracture toughness of an AISI 8640 resulfurized steel. The embrittlement effects of phosphorus and arsenic on this steel heat-treated to a lower bainitic structure were studied by employing fracture toughness tests, Charpy impact tests, X-ray fluorescent spectroscopy, and scanning electron microscopy (SEM). The results showed that the steel was embrittled by phosphorus at prior austenite grain boundaries in a manner similar to the tempered martensite embrittlement (TME) phenomenon. Arsenic is also believed to be involved in the embrittlement effect, specifically as related to producing a reduction in the upper shelf Charpy impact energy. Embrittlement was manifested by a reduced fracture toughness, an increase in the Charpy transition temperature, and intergranular fracture.

Authors:
 [1]; ; ;  [2]
  1. MTA, Inc., Mt. Arlington, NJ (United States). Development and Engineering Center
  2. Army Armament Research, Picatinny Arsenal, NJ (United States). Development and Engineering Center
Publication Date:
OSTI Identifier:
6099655
Resource Type:
Journal Article
Journal Name:
Journal of Testing and Evaluation; (United States)
Additional Journal Information:
Journal Volume: 21:5; Journal ID: ISSN 0090-3973
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; HIGH ALLOY STEELS; EMBRITTLEMENT; ARSENIC; BAINITE; CHARPY TEST; FRACTURE PROPERTIES; GRAIN BOUNDARIES; PHOSPHORUS; ALLOYS; DESTRUCTIVE TESTING; ELEMENTS; IMPACT TESTS; IRON ALLOYS; IRON BASE ALLOYS; MATERIALS TESTING; MECHANICAL PROPERTIES; MECHANICAL TESTS; MICROSTRUCTURE; NONMETALS; SEMIMETALS; STEELS; TESTING; 360103* - Metals & Alloys- Mechanical Properties

Citation Formats

Rinnovatore, J V, Lukens, K F, Reinhold, J, and Mahon, W. Embrittlement of an AISI 8640 lower bainite steel. United States: N. p., 1993. Web.
Rinnovatore, J V, Lukens, K F, Reinhold, J, & Mahon, W. Embrittlement of an AISI 8640 lower bainite steel. United States.
Rinnovatore, J V, Lukens, K F, Reinhold, J, and Mahon, W. 1993. "Embrittlement of an AISI 8640 lower bainite steel". United States.
@article{osti_6099655,
title = {Embrittlement of an AISI 8640 lower bainite steel},
author = {Rinnovatore, J V and Lukens, K F and Reinhold, J and Mahon, W},
abstractNote = {A study was performed to determine the cause of an abnormally low fracture toughness of an AISI 8640 resulfurized steel. The embrittlement effects of phosphorus and arsenic on this steel heat-treated to a lower bainitic structure were studied by employing fracture toughness tests, Charpy impact tests, X-ray fluorescent spectroscopy, and scanning electron microscopy (SEM). The results showed that the steel was embrittled by phosphorus at prior austenite grain boundaries in a manner similar to the tempered martensite embrittlement (TME) phenomenon. Arsenic is also believed to be involved in the embrittlement effect, specifically as related to producing a reduction in the upper shelf Charpy impact energy. Embrittlement was manifested by a reduced fracture toughness, an increase in the Charpy transition temperature, and intergranular fracture.},
doi = {},
url = {https://www.osti.gov/biblio/6099655}, journal = {Journal of Testing and Evaluation; (United States)},
issn = {0090-3973},
number = ,
volume = 21:5,
place = {United States},
year = {Wed Sep 01 00:00:00 EDT 1993},
month = {Wed Sep 01 00:00:00 EDT 1993}
}