Hot Stage Microscopes for Microhardness Measurements at
Elevated Temperatures
The microhardness test in the hot stage microscope is a simple method to quickly check the
temperature dependence of mechanical and physical properties. It is of special advantage
that a total hardness/temperature curve can be obtained from a single small specimen. Thus
one can get a selection on the basis of such hardness/temperature curves during the
development of heat-resistant alloys, before considerably more expensive high temperature
stability tests are started. The temperature dependence of ductility and hot workability of a
material and the effect of heat treatments can be prechecked. Diffusion and recrystallization
phenomena can be followed isothermally and polymorphic transformations can be detected.
LG. Reinacher, Handbuch der Mikroskopie in der 18 M. G. Lozinsky, Neue Hütte 10 (1965) 88
Technik, Herausgeber H. Freund, Umschau-Ver- 19 M.G. Lozinsky, J. Roy. Micr. Soc. 86 (1967)
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Rundschau (1967) 710 23 G. Reinacher, Schweizer Archiv 36 (1970) 246
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7 G. Reinacher, Beitrag in (2) 313 25 AB Bofors/Schweden, private Mitteilung
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653 27 P. Rabbe, G. Pomey, Beitrag in (15) 57
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146 teilung
13 K. L. Maurer, Berg- u. Hüttenmänn. Mh. 109 31 V. E. Lysaght, Beitrag in (15) 65
(1964) 98 32 J. H. Westbrook, Rev. Hautes Temper. et Re-
14 R. Mitsche, Z. Metallkde, 47 (1956) 171 fract. 3 (1966) 47
15 L. Meyding, VDI Berichte Nr. 100, Härteprü- 33 J.D. Baird, Associated Electrical Industries
fung in Theorie und Praxis, Düsseldorf Limited, Research Laboratory, Aldermaston,
(1967) 61 Berkshire, UK, private Mitteilung
16 Y. Yamane, A New High Temperature Micro- 34 E. R. Petty, H. O’Neill, Metallurgia 63 (1961)
hardness Tester and its Application, Prospekt 25
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Press, London (1961)
408
