tzm (Titanium-Zirconium-Molybdenum alloy) is an excellent high strength material for applications requiring demanding mechanical loads and temperatures above 700 degrees C. Available in rod and plate form, tzm is commonly manufactured through powder metallurgy or arc casting technology.
Compared to molybdenum, tzm alloy offers better strength, hardness, and ductility at elevated temperatures due to its higher recrystallization temperature and fine carbide grain structure. tzm is also less prone than pure molybdenum to embrittlement in applications involving repeated heating or cooling cycles and handling.
The chemical properties of tzm samples exposed to In were determined using differential thermal analysis (DTA) and X-ray diffraction (XRD). No measurable reactions between In and the constituents of tzm were detected. This result suggests that no compounds are anticipated to form between In and the primary constituents of tzm based on the binary phase diagram that is known for the tzm-In system.
Summary of tensile properties
The ultimate tensile strength, yield strength and total elongation of tzm samples exposed to In were comparable to those from unexposed tzm samples from the same material stock. Comparisons between In-exposed and unexposed tzm samples were made at test temperatures ranging from 22 degC to 800 degC and a range of strain rates.
The observed grain size, shape and orientation are similar to those analyzed in the literature for common tzm alloy in rod format [33,39]. Optical investigations of the interface of tzm-In did not reveal any corrosive interactions with In that could affect the microstructure or chemistry of the tzm sample.