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Title: Possible contribution of low shear modulus C₄₄ to the low Young’s modulus of Ti-36Nb-5Zr alloy

Despite the importance of single-crystal elastic constants of β-phase titanium alloys in understanding their low Young's modulus—a property crucial for many applications, such data are often difficult to obtain when the alloy composition is close to the instability limit of the β phase, where the presence of α" martensite precludes the fabrication of β-phase single crystal. In the present study, we extracted the single-crystal elastic constants of such a β-phase titanium alloy with low Young's modulus, Ti-36Nb-5Zr (wt. %), from polycrystalline specimens by using an in-situ synchrotron X-ray diffraction technique. It is indicated that the low Young's modulus of the alloy originates from the anomalously low shear modulus C₄₄ as well as the low shear modulus C', which is different from a common viewpoint that the Young's modulus of β-phase titanium alloys is dominantly controlled by the C'. This suggests that low C₄₄ is an important contributor to low Young's modulus for instable β-phase titanium alloys.
 [1] ;  [2] ;  [3] ;  [1] ;  [1]
  1. Beihang Univ., Beijing (China)
  2. Jiangsu Univ., Zhenjiang (China)
  3. Xi'an Jiaotong Univ., Xi'an (China)
Publication Date:
OSTI Identifier:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 13
American Institute of Physics (AIP)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
Country of Publication:
United States
elastic moduli; titanium; X-ray diffraction; crystalline alloys; polycrystals