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Title: Comparison of three Ni-Hard I alloys

Comparison of three Ni-Hard I alloys This report documents the results of an investigation which was undertaken to reveal the similarities and differences in the mechanical properties and microstructural characteristics of three Ni-Hard I alloys. One alloy (B1) is ASTM A532 class IA Ni-Hard containing 4.2 wt. pct. Ni. The second alloy (B2) is similar to B1 but higher in Cr, Si, and Mo. The third alloy (T1) also falls in the same ASTM specification, but it contains 3.3 wt. pct. Ni. The alloys were evaluated in both as-cast and stress-relieved conditions except for B2, which was evaluated in the stress-relieved condition only. While the matrix of the high Ni alloys is composed of austenite and martensite in both conditions, the matrix of the low Ni alloy consists of a considerable amount of bainite, in addition to the martensite and the retained austenite in as cast condition, and primarily bainite, with some retained austenite, in the stress relieved condition. It was found that the stress relieving treatment does not change the tensile strength of the high Ni alloy. Both the as cast and stress relieved high Ni alloys had a tensile strength of about 350 MPa. On the other hand, the tensile strength of the low Ni alloy more » increased from 340 MPa to 452 MPa with the stress relieving treatment. There was no significant difference in the wear resistance of these alloys in both as-cast and stressrelieved conditions. « less
Authors: ; ;
Publication Date:
OSTI Identifier:901596
Report Number(s):DOE/ARC-2004-070
Journal ID: 1546-2498; TRN: US200714%%119
Resource Type:Conference
Data Type:
Resource Relation:Journal Name: Materials Science & Technology 2004 Conference Proceedings; Journal Volume: 2004 - v. 1; Conference: Materials Science & Technology 2004 Conference, New Orleans, LA, Sept. 26-29, 2004
Research Org:Albany Research Center (ARC), Albany, OR
Sponsoring Org:USDOE - Office of Fossil Energy (FE)
Country of Publication:United States
Language:English
Subject: 36 MATERIALS SCIENCE; ALLOYS; AUSTENITE; BAINITE; MARTENSITE; MECHANICAL PROPERTIES; NI-HARD; STRESS RELAXATION; TENSILE PROPERTIES; WEAR RESISTANCE Ni-Hard white irons; Bainite; Martensite; Austenite; Abrasion resistant iron