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This chapter discusses the metallurgical changes that occur and the improvements that can be achieved in superalloys through solid-solution hardening, precipitation hardening, and dispersion strengthening. It also explains how further improvements can be achieved through the control of grain structure, as in columnar-grained alloys, or by the elimination of grain boundaries as with single-crystal superalloys.

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Strengthening Mechanisms, Superalloys: Alloying and Performance, By Blaine Geddes, Hugo Leon, Xiao Huang, ASM International, 2010, p 17–24,

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