<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31344600</termId><termName>martensite</termName><termType>PT</termType><termNote><![CDATA[ A hard, crystalline solid solution of carbon in iron, martensite is the chief constituent of hardened steel. It is a decomposition product of austenite formed by rapid quenching from high temperatures. ]]></termNote><termCreatedDate>2026-03-30 20:32:56</termCreatedDate><relation><relationType>BT</relationType><termId>31320469</termId><termName>mineral</termName><termType>PT</termType></relation></term>  </Zthes>