Bid document

Technical Specification for Titanium
Niobium Alloy for Use in PIP-II 650 MHz
Superconducting Radio Frequency
Cavities
Author: S. Chandrasekaran

Document Number: ED0008232

Fermi National Accelerator Laboratory

Document Approval
Originator S. Chandrasekaran
Reviewer
Approver

G. Wu

Revision History
Author

S. Chandrasekaran

Revision Date

29 AUG 2018

H. Park

15 JUN 2021

C. Narug, H. Park

7 FEB 2022

Fermi National Accelerator Laboratory

Date Approved
As in Teamcenter
As in Teamcenter
Description of Change
Initial release
Section 2: ASTM B884 changed from
applicable document to reference document.
Section 3: Added microstructure, hardness,
mechanical strength requirements.
Added section 4 documentation
requirements.
Added section 5 packaging and shipping.
Section 3.1: Microstructure replaced by
Finish.
Section 3.4: Mechanical strength
requirement changed.

Introduction

Fermi National Accelerator Laboratory (FNAL, Fermilab) designs and constructs superconducting particle accelerators. This specification addresses Titanium-Niobium alloy for superconducting radio-frequency (SRF) cavities, which are a key component of particle accelerators.
Components are fabricated from stock by machining or other metal-forming processes. Components are joined by electron-beam welding or TIG welding. Cavities are operated in a cryogenic vacuum environment, requiring pressure certifications and material traceability. All of these factors motivate the content of this specification.

Reference Documents

The requirements in this specification are originated or modified from ASTM B884-11 (reapproved 2019) and ASTM B265. This specification refers to ASTM Testing methods. However, industry or manufacturer’s standards are allowed as long as those standards are identified and approved by Fermilab.
 ASTM B884-11 (Reapproved 2019) Standard Specification for Niobium-Titanium Alloy Billets, Bar, and Rod for Superconducting Applications  ASTM B265 Specification for Titanium and Titanium Alloy Strip, Sheet, and Plate  ASTM E92 Standard Test Methods for Vickers Hardness and Knoop Hardness of Metallic Materials
 ASTM Test Methods E384 Standard Test Method for Microindentation Hardness of Materials
 ASTM E8 Standard Test Methods for Tension Testing of Metallic Materials Source of Documents
The documents may be obtained from the following source(s): ASTM Documents:
American Society of Testing and
Materials
1916 Race Street
Philadelphia, PA 19103