NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Phase transformation dynamics guided alloy design for additive manufacturing
Published
Author(s)
Qilin Guo, Minglei Qu, Chihpin Chuang, Lianghua Xiong, Ali Nabaa, Zachary Young, Yang Ren, Peter Kenesei, Fan Zhang, Lianyi Chen
Abstract
Fusion-based additive manufacturing technologies enable the fabrication of geometrically and compositionally complex parts unachievable by conventional manufacturing methods. However, the non-uniform and far-from-equilibrium heating/cooling conditions pose a significant challenge to control desirable phases in the as-printed parts. Here we report a precipitation hardening stainless steel design guided by phase transformation dynamics revealed by in-situ high-speed, high-energy, high-resolution X-ray diffraction. This stainless steel consistently forms desired fully martensitic structure across a wide range of cooling rates (102–107 ℃/s). It exhibits a tensile strength of 1364 MPa in the as-printed condition, comparable to the strength of its peak-aged wrought counterpart after precipitation hardening heat treatment. The superior as-printed property is attributed to the fully martensitic structure and the fine precipitates formed during the intrinsic heat treatment, characteristic of additive manufacturing. The phase transformation dynamics guided alloy design strategy demonstrated here opens the path for developing reliable, high-performance alloys specific for additive manufacturing.
Guo, Q.
, Qu, M.
, Chuang, C.
, Xiong, L.
, Nabaa, A.
, Young, Z.
, Ren, Y.
, Kenesei, P.
, Zhang, F.
and Chen, L.
(2022),
Phase transformation dynamics guided alloy design for additive manufacturing, Additive Manufacturing, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=932657
(Accessed October 7, 2025)