Document Type

Annual Report

Publication Date



University of Nevada, Las Vegas

Publisher Location

Las Vegas (Nev.)

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Last page number:



This task is focused on the evaluation of the effects of silicon content on both the corrosion behavior and radiation-induced embrittlement of martensitic stainless steels having compositions similar to that of modified 9Cr-1Mo steel, also known as T91 grade steel. T91 grade steel was selected to be a candidate structural material to contain molten lead-bismuth eutectic (LBE), which can act both as a target material and a coolant during the spallation process. The operating temperature during this process may range from 420-550 °C. Thus, moderate tensile strength of the containment material (T91) is a major requirement.

The beneficial effects of Si on both the metallurgical and corrosion properties of chromium-molybdenum (Cr-Mo) steels have previously been demonstrated at UNLV. Therefore, additions of Si ranging from 0.5-2.0 weight percent (wt%) was attempted in this investigation to explore Si effect on both the high temperature tensile properties and corrosion behavior of T91 grade steel. Corrosion studies in the presence of molten LBE could not be performed due to a lack of proper experimental facilities at UNLV. Therefore, detailed corrosion studies involving Si containing T91 grade steels were performed in an aggressive aqueous solution of acidic pH. Further, significant efforts have been made to determine both the impact and fracture toughness of the tested materials as a function of Si content.


Corrosion and anti-corrosives; Eutectic alloys; Lead-bismuth alloys; Martensitic stainless steel; Nuclear reactors — Materials — Testing; Silicon; Steel – Embrittlement; Stress corrosion

Controlled Subject

Corrosion and anti-corrosives--Testing; Eutectic alloys; Nuclear reactors--Materials--Testing


Materials Science and Engineering | Metallurgy | Nuclear Engineering | Oil, Gas, and Energy

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File Size

295 KB




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