Deformation Structure of Single-Phase Alloys 
Barbara Surowska, Krzysztof Palka, Jaroslaw Bienia$, Grzegorz Poslednik* 
Technical University of Lublin, Department of Materials Engineering, Poland; 
* Daewoo Motor Poland, Lublin 
Introduction 
Single-phase structure alloys, especially austenitic ones, belong to materials with high 
corrosion resistance in most of the aggressive environments as well as in high temperatures [1,2]. 
Required mechanical properties are obtained by cold work or heat treatment [3]. The most often 
i applied that type materials are stainless steels (SS) [4,5]. The structure and properties of Co-base 
wage alloy were compared to stainless steel in order to replace SS by Co-base alloy in installation in 
und dem ' chemical and food industry. 
um AZ The chemical composition of wrought ajloys is adjusted in such a way that single-phase 
matrixes with fcc structure are obtained, with slight quantity of carbide precipitates [6,7]. They 
strengthen rapidly during cold working. 
Experimental 
The investigations have been carried out on 316L stainless steel and the MP35N alloy (ISO 
5832/6-80) with the composition specified in Table 1. The non-deformed samples were heat treated 
by solution treatment in Ar atmosphere at 1373 K for 1 h, water quenched. The samples for cold 
working have been collected from bars or sheets. The strain has been carried out using an untaxial 
compression test obtaining € = 0.1 + 0.5. The effect of cold work on yield strength was showed on 
Fig. 1. 
The fatigue tests were worked out by tension-compression and one-sided bend. The 
microstructural observations have been carried out on optical, scanning and transmission 
microscopes. 
1400 
" Elemente 2181 em] . 
die Matrix 1200 
mschwamm 
gegebenen Linie 
1000 
= 800 
jalterschwämme © 
rzustellen. Das E 
zgjerungen, das > 600 
‚rmöglicht. Die 
Verbesserungen 
Astoffen und 001 
9 
1 0.1 Jin 0.2 
strain degree 
Fig.1: Cold work effect on yield strength of SS and Co-base alloys 
. VIP35N 
° 0.05 3 ne 5 0.25 0.3 
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