Development of a Modulated Microstructure Heat Treatable Steel.
Abstract
The objective of this research is to design and develop an alloy complex of modulated-mocrostructure steel (MMS) with a tensile strength of 400 ksi(2.8 KN/(mm squared) and fracture toughness of 150 ksi (the square root of in)(160 N/(mm squared)(the square root of m). The alloy complex combines layers of high strength steel with layers of partially austenitic steel. The full strength of the hard layer is usable because the ductility of the softer layer provides toughness which inhibits crack propagation. A model system whose hard layer is an 01 commercial tool steel and whose soft layer is a specially designed alloy (PS2) was manufactured and tested. A most important step in the fabrication process was to insure that the complex layers will partially debond when they are subject to stresses thus improving the fracture toughness. In the 01/PS2 system partial debonding is accomplished by the presence of oxide particles which are introduced into the interface for that purpose. This report summarizes development of that system and also further work on controlled interfacial bonding.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 28, 1975
- Accession Number
- ADA004884
Entities
People
- Daniel Ng
- P. G. Winchell
Organizations
- Purdue University