Strength, Hardness, and Ductility Evidence of Solid Solution Strengthening and Limited Hydrogen Embrittlement in the Alloy System Palladium-Copper (Cu wt. % 5–25)

Strength, hardness, and ductility characteristics were determined for a series of palladium-copper alloys that compositionally vary from 5 to 25 weight percent copper. Alloy specimens subjected to vacuum annealing showed clear evidence of solid solution strengthening. These specimens showed, as a function of increasing copper content, increased yield strength, ultimate strength, and Vickers microhardness, while their ductility was little affected by compositional differences. Annealed alloy specimens subsequently subjected to exposure to hydrogen at 323 K and PH2 = 1 atm showed evidence of hydrogen embrittlement up to a composition of ~15 wt. % Cu. The magnitude of the hydrogen embrittlement decreased with increasing copper content in the alloy.

Title	Strength, Hardness, and Ductility Evidence of Solid Solution Strengthening and Limited Hydrogen Embrittlement in the Alloy System Palladium-Copper (Cu wt. % 5–25)
Creator	Craft, A.
	Legall, G.
	DiMauro, S.
	Lubinsky, C.
	Miller, W.
	Portal, I.
	Roy, B.
	Nesbit, Steven M.
	Tait, R.
	Adutwum, A.
	Nadeau, M.
Publisher	Hydrogen
Academic Department	Mechanical Engineering
Division	Engineering
Organization	Lafayette College
Date Issued	July 16, 2021
Date Available	2022-04-13
Type	Article
Language	English
Keyword	hydrogen
	copper
	ductility
	strength
	embrittlement
	palladium
	hardness
Bibliographic Citation	DiMauro, S., et al. (2021 Jul 16) "Strength, Hardness, and Ductility Evidence of Solid Solution Strengthening and Limited Hydrogen Embrittlement in the Alloy System Palladium-Copper (Cu wt. % 5–25)." Hydrogen 2: 262–272.
Standard Identifier	DOI 10.3390/hydrogen2030014
Standard Identifier	Handle 10385/44558f779
Permalink	http://hdl.handle.net/10385/44558f779
Rights Statement	Creative Commons - Attribution
Rights Holders	Roy, B.
	Portal, I.
	Craft, A.
	Legall, G.
	Miller, W.
	Tait, R.
	Adutwum, A.
	DiMauro, S.
	Nadeau, M.
	Lubinsky, C.
	Nesbit, Steven M.