INTEGRATED COMPUTATIONAL MATERIALS ENGINEERING-BASED EVALUATION AND OPTIMIZATION OF ADDITIVELY MANUFACTURED BLAST RESISTANT NAVAL STEELS
Abstract
3T ManTech-Computational Materials EngineeringICME-based analysis and optimization of material processing specifications for blast resistant naval steelsThere has been significant research conducted on evaluating the microstructure and properties of additively" manufactured (AM) metallic alloys. Numerous industrial, academic, and government entities have focused primarily on development of"" aluminum, titanium, nickel, and stainless steel alloys for use in AM; due in part to the need for these alloys in high performance"" applications, but also because of relative cost to manufacture components. While evaluation of these alloys has been extremely help""ful for much of the AM community, there has been little focus on evaluatingmaterials specifically for use in Maritime environments"" (i.e., Navy-specific alloys). One such Navy-specific alloy is a 10Ni- blast resistant naval hull steel, which operates at a yield s""trength level of above 100ksi and provides very high toughness even at low operating temperatures.In the proposed work, QuesTek Inn""ovations, a leader in the field of Integrated Computational Materials Engineering (ICME), seeks to apply and develop its material pr"ocess-structure-property modeling capabilities to evaluate and optimize feedstock composition and post deposition processing operations for blast-resistant naval hull steels in additive manufacturing (AM). QuesTek proposes to analyze two steels within this family:" the 10Ni- steel grade currently used for Navy applications, and one of two higher strength blast resistant alloys known as BlastAll"oy160 and BlastAlloy130. Engineers at the Naval Surface Warfare Center Carderock have expressed specific interest in the development" of these alloys for AM, and research conducted under this proposed effort will serve to complement Carderock~s current AM evaluatio"n efforts on the 10Ni-steel. Engineers at Carderock will serve as the voice-of-the-customer for this program byproviding feedback o"n mechanical property and AM processing requirements, and as the Technology Transition Partner by conducting AM coupon and subscale" component builds with optimized steel compositions identified during the Program. Year 1 efforts will involve application of QuesTek~s ICME modeling toolset to AM processed 10Ni-blast steel and BlastAlloy130/BlastAlloy160 compositions. Initial relationships betwe"en alloy composition and deposition conditions will be evaluated to determine initial sensitivity to composition change, impurity pi""ckup, solidification segregation behavior, and initial mechanicalproperty response. QuesTek will produce BlastAlloy130/160 powder f""eedstock and evaluatemicrostructure and mechanical performance, doing similar for 10Ni-steel deposited under Carderock development"" work. At the end of Year 1, this information will be consolidated into an alteration or optimization of powder feedstock specificat""ions for one of these alloys. Year 2 work will consist of additional powder procurement, testing, and evaluation to demonstrate impr""oved performance and process robustness. Again, QuesTek will iterate on feedstock specification orpost-deposition processing optimi"zation to improve AM-processed performance. Task 3 will culminate by transitioning processing data and feedstock to Carderock for de"position qualification and testing, and subscale component development. Subscale component specific testing, such as blast protectio""n, high strain rate testing, and the like, may be explored in this Year as well.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 07, 2017
- Source ID
- N000141712565
Entities
People
- Jason Sebastian
Organizations
- Office of Naval Research
- QuesTek (United States)
- United States Navy